Narada 12NDT26 User manual

VALVE REGULATED SEALED LEAD ACID BATTERY
Acme range
(Front access design)
OPERATION MANUAL
Version 4.2
NARADA POWER SOURCE CO., LTD
Email: [email protected] Website: www.naradapower.com

Operation manual for Acme series V4.2
- 2 -
Contents
Important Safety Instructions.......................................................................................................- 3 -
Chapter One Product Introduction ............................................................................................ - 4 -
1. Features...........................................................................................................................- 4 -
2. Main application fields ...................................................................................................- 4 -
3. Indication of Type ...........................................................................................................- 5 -
4. Types & Dimensions....................................................................................................- 5 -
5. Dimension and sketch map.............................................................................................- 6 -
6. Terminals sketch map......................................................................................................- 8 -
7. Working principle............................................................................................................- 9 -
Chapter Two Technical Characteristics..................................................................................... - 9 -
1. Discharge Performance...................................................................................................- 9 -
2. Constant current and constant power data sheet ...........................................................- 10 -
3. Charge Performance Curve...........................................................................................- 15 -
4. Internal resistance and short circuit current ..................................................................- 15 -
Chapter Three Operation and Maintenance............................................................................. - 16 -
1. Operation Conditions....................................................................................................- 16 -
2. Capacity and influence factors......................................................................................- 16 -
3. Ambient Temperature, Capacity and Life .....................................................................- 17 -
4. Charging request...........................................................................................................- 20 -
5. Storage ..........................................................................................................................- 21 -
Chapter four Maintenance................................................................................................... - 23 -
1. Regulated Maintenance.................................................................................................- 23 -
2. Precautions....................................................................................................................- 23 -
Annex 1.............................................................................................................................- 27 -

Operation manual for Acme series V4.2
- 3 -
Important Safety Instructions
Please read this operation manual carefully. It offers very important safety instructions,
installation and operation guide, and ensure your equipment with best performance
and prolong the service life of your equipment.
·For the sake of your safety, please do not attempt to remove the components of
the battery. The maintenance of the battery can only be carried out by service
engineers specially trained by the principal.
·Considering the potential harm of the lead component to the health and
environment, the battery can be replaced only by the service center authorized by
the manufacturer. To replace the battery or maintenance equipment, please call
the after-sales service hotline for information of the nearest service center.
·Please check the local regulations on the correct way of dealing with battery
disposal or send the battery to the authorized service center for replacement.
·Battery replacement should be operated or supervised by engineers who are
experienced and aware of the preventive measures on the potential harm of the
battery.
·Warning - Do not smoke and refrain having fire near the battery.
·Warning - Do not use any organic solvent to clean the battery.
·Warning - Do not have fire near the battery or it may explode.
·Warning - Do not remove the components of the battery as it contains electrolyte
that may cause injury to the human body.
·Warning - Battery may cause short circuit. Please remove any watches and
jewelry during replacement of the battery, and operate with tools with insulated
materials.
Warning
Electricity
danger
Protecting your eye
Watch
Short-circuits
With adults custody
Read the
manual
Fire
forbidden
Circle use
Do not put
batteries into
dustbin
The product has past
the UL Safe
authentication

Operation manual for Acme series V4.2
- 4 -
Chapter One Product Introduction
1. Features
1.1 Long life
1.1.1 4BS paste technology
1.1.2 Special paste prescription
1.1.3 Special patent grid alloy
1.1.4 Thick plate design
1.2 Reliable seal performance, no acid spillage to cause equipment erosion.
1.2.1 Reliable seal performance, recombination efficiency reach 99%
1.2.2 Patented post sealing structure
1.2.3 Whole valve design ensure the precision
1.3 Excellent high rate discharge performance
1.3.1 Cross-wall welding between each cell, this construction made internal
resistance very low
1.3.2 Superior grid radiates style design; raise the high rate discharge
performance.
1.3.3 Patent paste technology
1.3.4 Copper core cable, copper bar as optional
1.4 Unique Rack line dimension Design Created by Narada in China
1.4.1 Long and narrow construction design, good at heat dispersing ability
1.4.2 Both positive and negative posts are in one side of the battery, easy for
monitoring and maintenance.
1.4.3 Flexible connectors to be fit together according to client demand
1.4.4 Patent gas collecting system
2. Main application fields
2.1 Telecom standby system
2.2 UPS system
2.3 Power system

Operation manual for Acme series V4.2
- 5 -
3. Indication of Type
12
N
D
F/T
－
XXX
10H Rated Capacity
Front terminal (normal design)
Narada type code
12V Series
4. Types & Dimensions
Table 1-1 Narada Acme series battery specification
Type
Normal
Voltage
（V）
Rated
Capacity
C10(Ah)
Dimensions(mm)
Weight
(Kg)
Length
Width
Height
12NDT26
12
26
250
97
148.5
9.3
12NDF50
12
50
390
105
200
21.0
12NDF85
12
85
390
105
270
31.0
12NDF100
12
100
390
105
287
33.0
12NDT100A
12
100
390
105
287
32.5
12NDT100S
12
100
395
108
287
31.0
12NDF125
12
125
558
125
270
45.0
12NDT150S
12
150
550
125
283
48.0
12NDF155
12
155
558
125
270
52.5
12NDT170S
12
170
550
125
283
51.5
12NDT180
12
180
558
125
316
60.0
12NDT190
12
190
558
125
316
60.5

Operation manual for Acme series V4.2
- 6 -
12NDT190S
12
190
558
125
316
59.0
12NDT200S
12
200
558
125
316
59.5
5. Dimension and sketch map
12NDT26
12NDT100A
12NDT26

Operation manual for Acme series V4.2
- 7 -
12NDT180/12NDT190
12NDT100S
12NDT150S
12NDT170S

Operation manual for Acme series V4.2
- 8 -
6. Terminals sketch map
12NDT190S
12NDT200S
12NDT100S, 12NDT150S
12NDT170S, 12NDT190S
12NDT200S, 12NDT26
12NDT180, 12NDT190,

Operation manual for Acme series V4.2
- 9 -
7. Working principle
The chemical reaction-taking place in lead acid battery is as follows:
Pb+PbO2+2H2SO4 2PbSO4+2H2O
Following by-reaction ①takes place in ordinary lead acid battery:
2H2O 2H2↑+O2↑ ①
This by-reaction makes water loss gradually and pure water need to be added
regularly to keep the battery operate normally.
Acme series battery adopts design of barren-liquor and utilizes AGM separator. Thus
there is a path existing between the positive and the negative. Also special alloy grid
is chosen to increase vent hydrogen over-potential gassing on the negative plate,
which prevents generation of Hydrogen. Otherwise, the oxygen generated from
positive diffuses through separator to the negative and the oxygen gas reacts quickly
and is recombined into water. The reactions are as follows:：
2Pb +O22PbO ②
PbO+ H2SO4 PbSO4+H2O ③
So it is possible to build Acme series battery in sealed structure.
Chapter Two Technical Characteristics
1. Discharge Performance
Fig.2-1 is the terminal voltage vs discharge time curves at different current at 25°C .
Discharge
Charge

Operation manual for Acme series V4.2
- 10 -
Fig.2-1. Discharge Curves at different current
2. Constant current and constant power data sheet
Table 2-1 constant current discharge data (Amperes, 25°C )
End
Voltage
5min
15min
30min
45min
1h
2h
3h
4h
5h
6h
8h
10h
12h
20h
24h
12NDT26
1.60V
97.8
52.5
31.8
23.0
18.6
10.7
7.75
6.08
5.14
4.41
3.39
2.68
2.35
1.47
1.23
1.67V
91.5
50.6
31.3
22.9
18.5
10.6
7.59
6.03
5.11
4.37
3.35
2.64
2.35
1.46
1.22
1.70V
91.0
49.8
30.8
22.7
18.4
10.6
7.59
6.03
5.03
4.34
3.31
2.64
2.32
1.46
1.22
1.75V
83.2
48.2
30.5
22.6
18.1
10.3
7.49
5.93
5.00
4.31
3.29
2.63
2.32
1.45
1.22
1.80V
74.9
44.9
29.2
21.6
17.6
10.2
7.44
5.93
4.90
4.22
3.25
2.60
2.30
1.44
1.21
1.83V
71.2
41.2
28.7
20.9
16.9
10.1
7.18
5.64
4.74
4.07
3.21
2.51
2.19
1.44
1.20
1.85V
67.1
39.9
26.7
20.1
16.4
9.70
6.97
5.56
4.62
3.98
3.11
2.49
2.16
1.40
1.19
12NDF50
1.60V
188
101
61.2
44.3
35.8
20.6
14.9
11.7
9.88
8.49
6.51
5.36
4.52
2.83
2.36
1.67V
176
97.4
60.1
44.0
35.6
20.4
14.6
11.6
9.83
8.41
6.47
5.28
4.51
2.80
2.34
1.70V
175
95.7
59.3
43.7
35.4
20.3
14.6
11.6
9.67
8.35
6.44
5.28
4.46
2.80
2.34
1.75V
160
92.7
58.7
43.4
34.8
19.8
14.4
11.4
9.62
8.28
6.37
5.25
4.46
2.79
2.34
1.80V
144
86.4
56.2
41.6
33.9
19.6
14.3
11.4
9.42
8.11
6.33
5.20
4.43
2.76
2.33
1.83V
137
79.2
55.2
40.2
32.5
19.4
13.8
10.9
9.11
7.83
6.18
5.01
4.21
2.76
2.30
1.85V
129
76.7
51.3
38.6
31.5
18.6
13.4
10.7
8.89
7.66
5.98
4.97
4.16
2.70
2.28
12NDF85
1.60V
307
165
100
72.5
58.6
33.6
24.4
19.1
16.2
13.9
10.6
8.76
7.38
4.62
3.86
1.67V
288
159
98.3
71.9
58.2
33.4
23.9
19.0
16.1
13.7
10.6
8.67
7.37
4.58
3.83
1.70V
286
156
96.9
71.4
57.8
33.2
23.8
18.9
15.8
13.6
10.5
8.63
7.30
4.57
3.83
1.75V
262
151
96.0
70.9
57.0
32.3
23.5
18.7
15.7
13.5
10.4
8.58
7.29
4.56
3.82
1.80V
235
141
91.9
68.0
55.5
32.0
23.4
18.6
15.4
13.3
10.4
8.50
7.23
4.52
3.82
1.83V
224
129
90.2
65.7
53.1
31.6
22.6
17.8
14.9
12.8
10.1
8.18
6.88
4.51
3.75
1.85V
210
125
83.8
63.1
51.4
30.5
22.0
17.6
14.5
12.5
9.78
8.12
6.80
4.42
3.72
End
Voltage
5min
15min
30min
45min
1h
2h
3h
4h
5h
6h
8h
10h
12h
20h
24h
12NDF100

Operation manual for Acme series V4.2
- 11 -
1.60V
361
194
118
85.3
68.9
39.5
28.7
22.5
19.0
16.3
12.5
10.3
8.68
5.44
4.54
1.67V
339
187
116
84.6
68.5
39.3
28.2
22.4
18.9
16.2
12.4
10.2
8.67
5.39
4.50
1.70V
336
184
114
84.0
68.0
39.0
28.0
22.3
18.6
16.0
12.4
10.2
8.58
5.38
4.50
1.75V
309
178
113
83.4
67.0
38.0
27.7
22.0
18.5
15.9
12.3
10.1
8.58
5.37
4.50
1.80V
277
166
108
80.0
65.3
37.7
27.5
21.9
18.1
15.6
12.2
10.0
8.51
5.31
4.49
1.83V
264
152
106
77.3
62.4
37.2
26.6
20.9
17.5
15.1
11.9
9.63
8.09
5.30
4.42
1.85V
247
148
98.6
74.3
60.5
35.8
25.9
20.7
17.1
14.7
11.5
9.55
8.00
5.20
4.38
End
Voltage
5min
15min
30min
45min
1h
2h
3h
4h
5h
6h
8h
10h
12h
20h
24h
12NDF125
1.60V
410
220
133
96.7
78.2
44.8
32.5
26.9
23.5
20.3
15.8
13.0
11.0
6.85
5.73
1.67V
385
212
131
96.0
77.7
44.6
31.9
26.8
23.3
20.2
15.6
12.8
10.9
6.79
5.67
1.70V
381
209
129
95.3
77.1
44.2
31.8
26.6
23.8
20.2
15.6
12.8
10.8
6.78
5.67
1.75V
350
202
128
94.6
76.0
43.1
31.4
26.3
23.4
20.1
15.4
12.7
10.8
6.76
5.67
1.80V
314
188
123
90.7
74.0
42.7
31.2
26.3
22.8
19.7
15.3
12.6
10.7
6.70
5.66
1.83V
299
173
120
87.7
70.8
42.2
30.1
25.0
22.1
19.0
15.0
12.1
10.2
6.68
5.57
1.85V
281
167
112
84.2
68.6
40.6
29.3
24.7
21.5
18.6
14.5
12.0
10.2
6.55
5.52
End
Voltage
5min
15min
30min
45min
1h
2h
3h
4h
5h
6h
8h
10h
12h
20h
24h
12NDF155
1.60V
507
273
165
120
96.8
55.5
40.2
33.3
29.1
25.1
19.5
16.1
13.7
8.48
7.09
1.67V
476
263
162
119
96.2
55.2
39.5
33.2
28.9
25.0
19.3
15.8
13.5
8.41
7.02
1.70V
472
258
160
118
95.5
54.8
39.3
33.0
29.5
25.0
19.3
15.9
13.4
8.39
7.02
1.75V
433
250
159
117
94.1
53.4
38.8
32.6
29.0
24.8
19.1
15.8
13.4
8.37
7.02
1.80V
389
233
152
112
91.6
52.9
38.6
32.5
28.2
24.3
19.0
15.6
13.3
8.29
7.00
1.83V
371
214
149
109
87.6
52.2
37.3
31.0
27.3
23.5
18.5
15.0
12.6
8.27
6.89
1.85V
347
207
138
104
84.9
50.3
36.3
30.6
26.7
23.0
17.9
14.9
12.7
8.11
6.83
12NDT180
1.60V
504
316
208
153
125
72.4
51.3
40.5
34.4
29.1
23.0
18.5
15.9
10.0
8.26
1.67V
472
311
205
153
124
71.7
51.1
40.5
34.2
28.8
22.8
18.4
15.8
9.85
8.19
1.70V
455
305
202
152
123
71.4
50.9
40.4
34.1
28.7
22.7
18.3
15.7
9.76
8.15
1.75V
432
292
194
149
122
70.8
50.6
40.2
33.9
28.4
22.5
18.1
15.6
9.66
8.08
1.80V
388
268
183
142
118
69.3
49.8
39.8
33.3
27.9
22.4
18.0
15.5
9.66
8.04
1.83V
354
251
174
136
116
67.5
48.9
39.3
32.6
27.2
22.1
17.9
15.4
9.57
8.00
1.85V
336
239
170
131
113
65.7
48.0
38.8
32.1
26.9
21.8
17.8
15.3
9.57
7.95
12NDT190
1.60V
532
334
220
162
132
76.4
54.2
42.8
36.3
30.7
24.3
19.5
16.8
10.5
8.72
1.67V
498
328
216
162
131
75.7
53.9
42.8
36.1
30.4
24.1
19.4
16.7
10.3
8.64
1.70V
480
322
213
160
130
75.4
53.7
42.6
36.0
30.3
24.0
19.3
16.6
10.3
8.60
1.75V
456
308
205
157
129
74.7
53.4
42.4
35.8
30.0
23.8
19.1
16.5
10.1
8.53
1.80V
410
283
193
150
125
73.2
52.6
42.0
35.2
29.5
23.6
19.0
16.4
10.1
8.49
1.83V
374
265
184
144
122
71.3
51.6
41.5
34.4
28.7
23.3
18.9
16.3
10.1
8.44
1.85V
355
252
179
138
119
69.4
50.7
41.0
33.9
28.4
23.0
18.8
16.2
10.1
8.39
End
Voltage
5min
15min
30min
45min
1h
2h
3h
4h
5h
6h
8h
10h
12h
20h
24h
12NDT100A
1.60V
361
194
118
85.3
68.9
39.5
28.7
22.5
19.0
16.3
12.5
10.3
8.68
5.44
4.54
1.67V
339
187
116
84.6
68.5
39.3
28.2
22.4
18.9
16.2
12.4
10.2
8.67
5.39
4.50
1.70V
336
184
114
84.0
68.0
39.0
28.0
22.3
18.6
16.0
12.4
10.2
8.58
5.38
4.50
1.75V
309
178
113
83.4
67.0
38.0
27.7
22.0
18.5
15.9
12.3
10.1
8.58
5.37
4.50
1.80V
277
166
108
80.0
65.3
37.7
27.5
21.9
18.1
15.6
12.2
10.0
8.51
5.31
4.49
1.83V
264
152
106
77.3
62.4
37.2
26.6
20.9
17.5
15.1
11.9
9.63
8.09
5.30
4.42
1.85V
247
148
98.6
74.3
60.5
35.8
25.9
20.7
17.1
14.7
11.5
9.55
8.00
5.20
4.38
End
Voltage
5min
15min
30min
45min
1h
2h
3h
4h
5h
6h
8h
10h
12h
20h
24h
12NDT100S
1.60V
340
188
118
87.4
70.0
39.9
28.3
22.1
18.3
15.6
12.1
10.3
8.78
5.65
4.83

Operation manual for Acme series V4.2
- 12 -
1.67V
331
185
117
86.7
69.5
39.6
28.2
22.0
18.1
15.5
12.0
10.2
8.72
5.62
4.80
1.70V
323
183
116
86.1
69.1
39.4
28.0
21.8
18.0
15.4
12.0
10.2
8.67
5.59
4.80
1.75V
306
178
114
84.9
68.2
39.0
27.7
21.6
17.8
15.2
11.9
10.1
8.62
5.58
4.79
1.80V
278
170
110
82.7
66.6
38.2
27.2
21.3
17.6
15.0
11.7
10.0
8.57
5.54
4.78
1.83V
259
162
106
80.2
64.8
37.5
26.8
21.0
17.4
14.9
11.6
9.9
8.48
5.53
4.77
1.85V
248
156
103
78.3
63.4
36.9
26.5
20.8
17.2
14.7
11.5
9.8
8.38
5.46
4.70
12NDT150S
1.60V
420
231
148
114
91.4
55.1
40.5
33.3
27.9
24.0
19.0
15.7
13.4
8.96
7.75
1.70V
369
223
145
111
91.1
54.6
39.9
32.7
27.4
23.6
18.5
15.3
12.9
8.70
7.43
1.75V
340
216
144
110
90.2
54.5
39.8
32.6
27.2
23.3
18.4
15.1
12.8
8.59
7.29
1.80V
306
192
134
105
87.8
53.8
39.7
32.3
27.0
23.2
18.2
15.0
12.7
7.72
6.42
1.83V
274
182
129
102
85.8
53.7
39.2
32.2
26.9
23.1
18.1
14.8
12.5
7.61
6.33
1.85V
267
175
124
99
83.2
52.4
38.9
32.1
26.8
23.0
17.9
14.6
12.3
7.49
6.22
12NDT170S
1.60V
455
248
163
136
113
66.8
48.8
38.7
32.2
27.6
21.5
17.8
15.3
9.74
8.36
1.67V
422
244
161
134
111
66.1
48.2
38.2
31.8
27.3
21.3
17.6
15.1
9.36
7.92
1.70V
402
241
160
133
110
65.7
47.9
37.9
31.6
27.1
21.2
17.5
15.0
9.31
7.89
1.75V
370
235
159
132
108
64.9
47.5
37.6
31.2
26.8
21.0
17.4
14.9
9.30
7.83
1.80V
333
216
150
128
106
64.8
47.2
37.4
31.1
26.7
20.8
17.0
14.5
9.14
7.64
1.83V
310
213
146
124
102
62.9
46.4
36.8
30.6
26.2
20.6
16.8
14.3
8.84
7.39
1.85V
286
197
139
120
101
62.5
45.8
36.5
30.4
26.1
20.2
16.4
13.7
8.15
6.70
12NDT190S
1.60V
519
317
208
158
128
75.0
53.8
42.3
34.9
29.8
23.2
20.8
17.7
12.5
10.8
1.67V
479
307
205
156
127
74.4
53.3
41.9
34.6
29.6
23.1
20.7
17.7
12.4
10.6
1.70V
463
300
202
154
126
74.2
53.3
41.9
34.6
29.5
23.0
20.5
17.4
12.2
10.4
1.75V
423
272
190
149
124
74.0
53.2
41.8
34.5
29.4
22.8
19.9
16.5
10.5
8.53
1.80V
350
245
179
144
121
73.9
53.1
41.6
34.4
29.2
22.2
19.0
16.3
10.2
8.50
1.83V
326
232
171
139
117
73.7
52.8
41.4
34.2
29.0
21.7
18.6
16.0
9.88
8.26
1.85V
310
219
162
132
112
70.7
51.9
40.9
33.6
28.4
21.4
18.5
15.3
9.11
7.49
12NDT200S
1.60V
546
333
219
166.3
135.1
79.0
56.7
44.5
36.8
31.4
24.5
21.9
18.6
13.2
11.3
1.67V
504
324
216
164.5
133.8
78.3
56.1
44.1
36.4
31.2
24.3
21.8
18.6
13.1
11.2
1.70V
488
315
212
162.5
132.6
78.1
56.1
44.1
36.4
31.1
24.2
21.6
18.4
12.9
11.0
1.75V
445
286
200
156.9
130.5
77.9
56.0
44.0
36.3
30.9
24.0
20.9
17.4
11.1
8.95
1.80V
369
257
188
151.7
127.9
77.8
55.9
43.8
36.2
30.7
23.3
20.0
17.1
10.8
8.98
1.83V
344
244
180
146.0
123.5
77.6
55.5
43.6
36.0
30.5
22.8
19.6
16.9
10.4
8.70
1.85V
326
231
171
138.7
117.6
74.4
54.7
43.1
35.4
29.9
22.6
19.5
16.1
9.59
7.89
Table 2-1 Constant power discharge data (Watts per cell, 25°C )
End
Voltage
5min
15min
30min
45min
1h
2h
3h
4h
5h
6h
8h
10h
12h
20h
24h
12NDF26
1.60V
163.3
92.0
57.7
43.3
35.0
20.2
14.7
11.7
9.83
8.48
6.55
5.41
4.54
2.91
2.44
1.67V
157.0
90.5
57.2
43.0
34.8
20.1
14.6
11.6
9.83
8.42
6.55
5.36
4.54
2.90
2.44
1.70V
156.5
89.4
57.2
43.0
34.7
20.0
14.6
11.6
9.72
8.37
6.50
5.30
4.50
2.90
2.43
1.75V
145.6
88.9
56.7
42.8
34.2
19.9
14.4
11.6
9.72
8.37
6.45
5.30
4.50
2.89
2.43
1.80V
133.6
84.2
55.6
41.8
34.2
19.9
14.4
11.5
9.52
8.27
6.40
5.30
4.49
2.89
2.43
1.83V
127.9
77.0
54.6
40.6
32.8
19.6
14.0
11.1
9.31
8.01
6.34
5.15
4.35
2.88
2.41
1.85V
119.6
74.9
50.9
38.9
31.7
19.0
13.6
11.0
9.10
7.85
6.14
5.11
4.31
2.83
2.39
12NDF50
1.60V
314
177
111
83.2
67.4
38.8
28.3
22.5
18.9
16.3
12.6
10.4
8.74
5.60
4.69
1.67V
302
174
110
82.7
67.0
38.7
28.0
22.4
18.9
16.2
12.6
10.3
8.74
5.58
4.69
1.70V
301
172
110
82.6
66.8
38.5
28.0
22.3
18.7
16.1
12.5
10.2
8.66
5.57
4.68

Operation manual for Acme series V4.2
- 13 -
1.75V
280
171
109
82.4
65.8
38.3
27.7
22.3
18.7
16.1
12.4
10.2
8.66
5.55
4.68
1.80V
257
162
107
80.4
65.7
38.2
27.6
22.2
18.3
15.9
12.3
10.2
8.63
5.55
4.67
1.83V
246
148
105
78.0
63.0
37.7
27.0
21.4
17.9
15.4
12.2
9.91
8.37
5.54
4.64
1.85V
230
144
97.9
74.9
61.0
36.5
26.2
21.1
17.5
15.1
11.8
9.83
8.28
5.44
4.60
12NDF85
1.60V
513
290
181
136
110
63.4
46.3
36.7
31.0
26.7
20.7
17.0
14.3
9.15
7.67
1.67V
494
285
179
135
109
63.3
45.7
36.6
31.0
26.5
20.5
16.9
14.3
9.12
7.66
1.70V
491
282
179
135
109
63.0
45.7
36.5
30.5
26.3
20.4
16.7
14.2
9.10
7.65
1.75V
464
279
179
135
108
62.7
45.2
36.5
30.5
26.2
20.2
16.7
14.2
9.08
7.65
1.80V
426
264
174
131
107
62.5
45.1
36.4
30.0
26.0
20.2
16.6
14.1
9.08
7.64
1.83V
413
242
172
128
103
61.7
44.1
35.0
29.3
25.2
20.0
16.2
13.7
9.06
7.58
1.85V
391
236
160
122
100
59.7
42.9
34.6
28.6
24.7
19.4
16.1
13.5
8.88
7.52
End
Voltage
5min
15min
30min
45min
1h
2h
3h
4h
5h
6h
8h
10h
12h
20h
24h
12NDF100
1.60V
604
341
213
160
130
74.6
54.5
43.2
36.4
31.4
24.3
20.0
16.8
10.8
9.02
1.67V
581
335
211
159
129
74.4
53.8
43.1
36.4
31.2
24.2
19.8
16.8
10.7
9.02
1.70V
578
331
211
159
129
74.1
53.8
42.9
35.9
31.0
24.0
19.6
16.7
10.7
9.00
1.75V
539
329
210
158
127
73.7
53.2
42.9
35.9
30.9
23.8
19.6
16.6
10.7
9.00
1.80V
495
311
205
155
126
73.5
53.1
42.8
35.3
30.6
23.7
19.6
16.6
10.7
8.98
1.83V
473
285
203
150
121
72.6
51.8
41.2
34.5
29.7
23.5
19.1
16.1
10.7
8.92
1.85V
442
278
188
144
117
70.2
50.4
40.7
33.7
29.1
22.8
18.9
15.9
10.5
8.85
End
Voltage
5min
15min
30min
45min
1h
2h
3h
4h
5h
6h
8h
10h
12h
20h
24h
12NDF125
1.60V
685
387
241
181
147
84.6
61.8
51.7
45.1
39.0
30.6
25.2
21.3
13.6
11.4
1.67V
659
380
239
180
146
84.4
61.0
51.6
45.0
39.0
30.3
25.0
21.2
13.5
11.4
1.70V
655
376
239
180
146
84.0
61.0
51.4
46.0
39.0
30.2
24.8
21.0
13.5
11.3
1.75V
612
373
238
180
144
83.6
60.3
51.4
45.5
38.9
29.9
24.7
21.0
13.5
11.3
1.80V
561
352
233
175
143
83.3
60.2
51.2
44.4
38.5
29.9
24.6
20.9
13.5
11.3
1.83V
536
323
230
170
137
82.3
58.8
49.3
43.5
37.4
29.6
24.0
20.3
13.4
11.2
1.85V
501
315
213
163
133
79.6
57.2
48.7
42.4
36.6
28.7
23.8
20.4
13.2
11.1
12NDF155
1.60V
848
479
299
225
182
105
76.5
64.0
55.8
48.3
37.9
31.1
26.4
16.8
14.1
1.67V
816
470
296
223
181
104
75.5
63.9
55.7
48.3
37.5
30.9
26.2
16.7
14.1
1.70V
811
465
296
223
180
104
75.5
63.6
56.9
48.3
37.5
30.7
26.0
16.7
14.0
1.75V
757
461
295
222
178
104
74.7
63.6
56.3
48.2
37.1
30.6
26.0
16.7
14.0
1.80V
695
436
288
217
177
103
74.5
63.4
55.0
47.7
37.0
30.5
25.9
16.7
14.0
1.83V
663
400
284
211
170
102
72.8
61.1
53.8
46.3
36.7
29.7
25.1
16.6
13.9
1.85V
621
390
264
202
165
98.6
70.8
60.3
52.5
45.4
35.5
29.5
25.2
16.3
13.8
12NDT180
1.60V
879
584
374
300
255
151
107
83.5
70.3
59.8
45.9
39.4
34.1
20.9
17.4
1.67V
831
568
371
298
254
151
107
83.2
70.0
59.6
45.8
39.3
34.0
20.7
17.3
1.70V
801
557
369
297
253
150
106
83.0
69.7
59.5
45.7
39.3
33.9
20.6
17.3
1.75V
740
536
362
293
249
149
106
82.5
69.3
59.2
45.4
39.2
33.8
20.4
17.2
1.80V
680
507
351
284
243
146
104
81.5
68.3
58.7
45.1
39.0
33.6
20.1
17.2
1.83V
660
480
340
276
236
142
102
80.5
67.3
58.1
44.9
38.7
33.4
19.9
17.1
1.85V
647
458
333
270
231
139
100
79.5
66.1
57.4
44.6
38.6
33.2
19.6
17.1
12NDT190
1.60V
928
616
395
317
269
159
113
88.1
74.2
63.1
48.5
41.6
36.0
22.0
18.4
1.67V
877
600
392
315
268
159
113
87.8
73.9
62.9
48.3
41.5
35.9
21.9
18.3
1.70V
846
588
390
314
267
158
112
87.6
73.6
62.8
48.2
41.5
35.8
21.7
18.3
1.75V
781
566
382
309
263
157
112
87.1
73.2
62.5
47.9
41.4
35.7
21.5
18.2
1.80V
718
535
371
300
257
154
110
86.0
72.1
62.0
47.6
41.2
35.5
21.2
18.2

Operation manual for Acme series V4.2
- 14 -
1.83V
697
507
359
291
249
150
108
85.0
71.0
61.3
47.4
40.9
35.3
21.0
18.1
1.85V
683
483
352
285
244
147
105
83.9
69.8
60.6
47.1
40.7
35.0
20.7
18.1
End
Voltage
5min
15min
30min
45min
1h
2h
3h
4h
5h
6h
8h
10h
12h
20h
24h
12NDT100A
1.60V
604
341
213
160
130
74.6
54.5
43.2
36.4
31.4
24.3
20.0
16.8
10.8
9.02
1.67V
581
335
211
159
129
74.4
53.8
43.1
36.4
31.2
24.2
19.8
16.8
10.7
9.02
1.70V
578
331
211
159
129
74.1
53.8
42.9
35.9
31.0
24.0
19.6
16.7
10.7
9.00
1.75V
539
329
210
158
127
73.7
53.2
42.9
35.9
30.9
23.8
19.6
16.6
10.7
9.00
1.80V
495
311
205
155
126
73.5
53.1
42.8
35.3
30.6
23.7
19.6
16.6
10.7
8.98
1.83V
473
285
203
150
121
72.6
51.8
41.2
34.5
29.7
23.5
19.1
16.1
10.7
8.92
1.85V
442
278
188
144
117
70.2
50.4
40.7
33.7
29.1
22.8
18.9
15.9
10.5
8.85
End
Voltage
5min
15min
30min
45min
1h
2h
3h
4h
5h
6h
8h
10h
12h
20h
24h
12NDT100S
1.60V
594
353
228
172
138
79.9
57.0
44.6
36.9
31.5
24.5
20.8
17.8
11.5
9.84
1.67V
587
349
226
170
137
79.4
56.7
44.4
36.6
31.3
24.3
20.6
17.6
11.3
9.65
1.70V
580
346
224
169
137
79.2
56.6
44.3
36.6
31.2
24.3
20.6
17.6
11.2
9.58
1.75V
559
336
220
166
135
78.6
56.2
44.1
36.4
31.0
24.1
20.4
17.4
11.0
9.38
1.80V
520
321
213
162
132
77.4
55.6
43.6
36.0
30.7
23.9
20.2
17.2
10.9
9.21
1.83V
490
308
206
158
129
76.3
55.0
43.2
35.7
30.5
23.7
20.1
17.0
10.7
9.09
1.85V
468
297
201
154
126
75.1
54.1
42.6
35.2
30.0
23.3
19.7
16.7
10.5
8.85
12NDT150S
1.60V
741
426
286
223
184
115
82.8
68.0
56.6
48.6
37.9
31.1
26.4
16.7
14.2
1.67V
688
419
284
221
182
113
82.1
67.4
56.1
48.2
37.6
30.9
26.2
16.4
13.8
1.70V
656
414
283
220
181
112
81.5
67.0
55.7
47.8
37.4
30.8
26.1
16.2
13.6
1.75V
604
402
279
218
180
111
81.2
66.9
55.5
47.7
37.1
30.6
26.0
16.1
13.5
1.80V
563
369
262
208
175
110
80.6
66.8
55.1
47.4
37.0
30.1
25.3
15.4
12.9
1.83V
507
347
252
203
172
109
80.2
66.1
54.6
47.3
36.5
29.5
24.9
15.2
12.5
1.85V
506
346
249
199
167
105
77.8
64.1
53.5
46.0
35.9
29.4
24.7
14.4
11.8
12NDT170S
1.60V
784
477
321
268
222
135
96.9
76.7
63.5
54.4
42.6
35.2
30.1
19.4
16.5
1.67V
735
471
319
266
220
133
96.0
76.0
63.2
54.2
42.4
35.0
29.9
19.2
16.3
1.70V
715
466
318
265
219
132
95.9
75.9
63.1
54.1
42.3
34.9
29.8
19.1
16.2
1.75V
679
454
313
263
216
131
95.4
75.6
62.8
53.9
42.0
34.7
29.7
18.9
16.1
1.80V
602
414
294
253
212
130
94.6
74.9
62.3
53.5
41.6
33.6
28.1
17.1
14.3
1.83V
556
405
288
247
206
129
94.1
74.5
61.8
52.8
40.9
33.4
28.0
16.5
13.5
1.85V
546
386
279
242
203
128
93.8
74.4
61.6
52.4
40.1
32.3
26.9
15.6
12.7
12NDT190S
1.60V
896
589
399
307
251
149
107
84.5
70.8
60.0
46.9
42.1
36.0
23.3
20.0
1.67V
843
565
388
301
247
148
107
84.5
70.7
59.9
46.7
41.8
35.6
22.6
19.3
1.70V
815
549
381
297
245
148
107
84.4
70.6
59.8
46.7
41.6
35.3
22.1
18.7
1.75V
753
510
362
287
239
147
107
84.2
70.4
59.7
46.4
40.9
34.3
20.6
17.0
1.80V
635
455
339
276
235
147
107
84.1
70.2
59.5
45.4
39.2
32.2
18.8
16.1
1.83V
597
434
327
267
228
146
106
83.9
70.1
59.3
44.8
38.6
31.7
17.5
14.9
1.85V
570
415
314
257
220
142
105
83.3
68.7
58.3
44.2
38.3
31.6
16.4
14.0
12NDT200S
1.60V
943
620
420
322.7
263.9
156.3
112.8
88.9
74.6
63.2
49.4
44.31
37.90
24.53
21.04
1.67V
887
594
409
316.5
260.2
155.8
112.8
89.0
74.5
63.1
49.2
43.96
37.44
23.83
20.28
1.70V
858
578
401
312.2
257.8
155.6
113.0
88.8
74.3
62.9
49.2
43.78
37.16
23.31
19.70
1.75V
792
537
381
301.9
252.1
154.7
112.7
88.6
74.1
62.8
48.9
43.07
36.15
21.66
17.92
1.80V
668
479
357
290.5
246.9
154.7
112.5
88.5
73.9
62.6
47.8
41.25
33.88
19.75
16.99
1.83V
628
457
344
281.4
240.0
153.8
111.4
88.3
73.8
62.4
47.2
40.68
33.40
18.41
15.69
1.85V
600
437
330
270.6
231.2
149.1
110.6
87.6
72.3
61.3
46.6
40.33
33.23
17.23
14.77

Operation manual for Acme series V4.2
- 15 -
3. Charge Performance Curve
Fig.2-2 is the battery voltage vs charge time curves at 25°C
Fig.2-2. Charge Curves at 25°C
4. Internal resistance and short circuit current
The internal resistance of the battery is a dynamic nonlinear parameter that is
continuously changed along with the temperature and discharge state. The internal
resistance is the lowest when battery is fully charged. The table 2-4 shows the internal
resistance and short circuit current of Narada battery in fully charged state according
to the IEC60896-21/22 standard.
Table 2-4. Internal resistance and short circuit current (25°C )
Type
Internal resistance (mΩ)
Short circuit current (A)
12NDT26
10.3
1218
12NDF50
8.87
1407
12NDF85
6.47
1864
12NDF100
6.31
1979
12NDF125
5.70
2229
12NDF155
4.27
2906

Operation manual for Acme series V4.2
- 16 -
12NDT180
3.88
3200
12NDT190
3.98
3200
12NDT100A
6.31
1979
12NDT100S
5.50
2318
12NDT150S
5.17
2450
12NDT170S
4.63
2758
12NDT190S
4.276
2978
12NDT200S
4.27
2978
Note: Short circuit current will decrease the voltage of the battery to 0V, and damage the internal components of
the battery.
Chapter Three Operation and Maintenance
1. Operation Conditions
Ambient temperature: Acme series optimum temperature is 15°C ～25°C , the higher
and lower temperatures will impact battery performance
Operation temperature range
Operate status
Temperature range
Optimum
temperature
Discharge
-40°C ～50°C
15°C ～25°C
Charge
-20°C ～50°C
15°C ～25°C
Storage
-20°C ～40°C
15°C ～25°C
Ambient humidity：≤95％
Cabinet ventilation conditions: meet the standard EN 50272-2:2001
2. Capacity and influence factors
2.1 The capacity of battery is the capacity that battery can be discharged under certain
conditions, expressed as signal C. The usual unit of capacity is ampere-hour,
shortened as Ah.
The capacity can be expressed in Rated Capacity or Actual Capacity. The Rated
Capacity please see Table 1-1. The Actual Capacity is the product of the discharge
current and the discharge time, the unit is Ah.
2.2 The Influence Factor of Actual Capacity
The actual capacity is mainly related with the battery’s construction, manufacturing

Operation manual for Acme series V4.2
- 17 -
process and operation circumstance. During operation, the factors that influence the
actual capacity are discharge rate, end voltage, ambient temperature and discharge
time.
2.3 Discharge Rate
If the discharge rate (hour rate) is smaller, the discharge current is larger, and the
discharge time is shorter, then the capacity, which can be discharged, is less. For
example, the discharge current of 3 hours rate is larger than that of 10 hours rate; and
the capacity of 3 hours rate is smaller than that of 10 hours rate.
2.4 End Voltage
The end voltage is the lowest working voltage below which the battery cannot be
discharged any more. Usually the end voltage of Acme range battery is 10.8V per
block. The capacity cannot be discharged more even if the end voltage drops, because
of the characteristics of lead acid battery. The lower end voltage will harm the battery,
especially when the voltage drops to 0V and the battery cannot be recharged in time.
This will shorten life of the battery greatly.
Table 3-1 discharge end voltage at different current
Discharge current (A)
Discharge end voltage (V/block)
I＜0.2C
10.8
0.2C≤I＜0.5C
10.2
0.5C≤I＜1.0C
9.30
I≥1.0C
7.80
3. Ambient Temperature, Capacity and Life
3.1 Relation of Ambient Temperature and Capacity
VRLA batteries can be used in very low or high temperature (below-15°C or above
45°C ). Yet all standard data (such as capacity, life, floating voltage) are measured
under standard temperature of 20°C -25°C . The capacity will decrease under lower
temperature as Fig. 3-1:

Operation manual for Acme series V4.2
- 18 -
Fig.3-1：Ambient Temperature VS Available Capacity
We may see that the capacity will decrease if the temperature is too low. For example,
if the temperature decrease 20°C , the capacity will decrease 16%. Meanwhile, the low
temperature will make the battery always in a less-charged state, then it may cause the
battery fail to discharge and the active material in negative plates sulfation.
The capacity will increase when the temperature increases. The capacity will increase
6% when the temperature increase 10°C . However, the high temperature will
accelerate the corrosion of the grid and cause water loss inside the battery, thus
shorten the life of the battery
So it is important to strictly control the ambient temperature. Please keep the room
ventilate and use air-condition when the temperature is too high.
3.2 Floating Operation
To choose given floating voltage is to make the battery operate under the best
condition. If the floating voltage is too high, the battery floating current will get
larger and expedite the grid erode speed, and cut down the service life of battery; if
the floating voltage too low, battery can not maintain full charged condition, can
cause sulphate, and reduce the capacity, and will also cut down the service life of
battery. Under 25°C ，the floating voltage of Narada Acme range battery is

Operation manual for Acme series V4.2
- 19 -
13.5V/block, temperature compensate factor is -18mV/°C /block.
Floating calculating formula under different temperature is:
VT=13.5-(T-25)×0.003×6
VT—Floating voltage under T temperature
Table 3-2 gives floating voltage under different temperature
Ambient
temperature(°C )
Floating voltage
(V/cell)
Floating voltage
(V/block)
≤5
2.31
13.86
10
2.295
13.77
15
2.28
13.68
20
2.265
13.59
25
2.25
13.50
30
2.235
13.41
35
2.22
13.32
≥40
2.205
13.23
Note: If ambient temperature below 5°C or above 40°C , temperature compensate is no
longer go on.
3.3 Equalization Charge
VRLA battery need Equalization Charge regularly to ensure the battery operating
normally, under 25°C condition，Narada Acme series battery each block equalization
voltage is 14.1V/block. The same, equalization voltage need to adjusted according to
the ambient temperature, temperature compensate factor is -30mV/°C /block,
Equalization voltage calculating formula under different temperature is:
VT=14.1-(T-25)×0.005×6
VT—equalization voltage under T temperature
Table 3-3 gives Equalization voltage under different temperature
Ambient
temperature(°C )
Equalization voltage
(V/cell)
Equalization voltage
(V/block)
≤5
2.45
14.7
10
2.425
14.55
15
2.40
14.4
20
2.375
14.25
25
2.35
13.95
30
2.325
14.25

Operation manual for Acme series V4.2
- 20 -
35
2.30
14.10
≥40
2.275
13.65
Note: If ambient temperature below 5°C or above 40°C , temperature compensate is no
longer go on.
3.4 Ambient Temperature and Life
Temperature raise can destroy battery, and reduce the service life .when the ambient
temperature exceed 25°C ，the service life reduce half for each raised 10°C , for
example, the battery design service life is 10 years under 25°C , But if operated under
35°C , the service life can only be 5 years, there is a formulas follows:
t25＝tT×2 （T－25）/10
wherein: T actual ambient temperature；
tT design life under T;
t25design life under 25°C condition
So that the ambient temperature should be controlled, the heat dispersing of VRLA
battery is not quite good, when the temperature run up to some extent can destroy the
battery and cause heat lose control phenomenon. If the temperature inside reach too
high some measures should taken to control it and the distance should not less than
10mm, and meanwhile adjust the floating voltage and equalization charging voltage
according to the manual request.
4. Charging request
4.1 Equalization charging
Following situation should take equalization charging:
a. There are more than two batteries which voltage is under 13.0V in one group
b. More than three months after floating operation
Equalization charging is recommend as follows: charge the battery group with
constant current not exceed 0.2C10A till the average voltage go up to
14.1V/block(25°C )，then change into constant voltage of 14.1V/block charging,
Equalization charging time is 24 hours.
4.2 Battery charging
Under following situation the battery group need charged method as equalization
charging: