Bosch C 70 User manual

Article nos.: 0 189 911 070 & 0 189 912 070
Bosch C70 charger
Operating instructions DE
EN
FR
IT
ES
TR
AR
PL
HU
EL
DA
NB
SV
NL
RU
CS
RO
HR
SR
BG
UK
SK
ET
LV
FI
MK
SL
SQ
Robert Bosch GmbH, Automotive Aftermarket, Auf der Breit 4, 76227 Karlsruhe, Germany, www.boschaftermarket.com
10.05.23

2
DE
EN
FR
IT
ES
TR
AR
PL
HU
EL
DA
NB
SV
NL
RU
CS
RO
HR
SR
BG
UK
SK
ET
LV
FI
MK
SL
SQ
Bedienungsanleitung ....................................................... 3
Operating instructions ................................................... 12
Mode d’emploi .............................................................. 19
Istruzioni d’uso.............................................................. 28
Instrucciones de uso ..................................................... 36
Kullanım Kılavuzu ..........................................................44
 .................................................................. 51
Instrukcja obsługi ..........................................................59
Használati utasítás ........................................................ 67
Οδηγίες χρήσης ............................................................. 75
Betjeningsvejledning ...................................................... 83
Bruksanvisning .............................................................. 90
Bruksanvisning .............................................................. 97
Bedieningshandleiding ................................................ 104
Инструкция по эксплуатации ..................................... 112
Návod k obsluze .......................................................... 120
Instrucțiuni de utilizare ...............................................128
Upute za upotrebu ...................................................... 136
Uputstvo za upotrebu .................................................. 143
Упутство за употребу ..................................................150
Ръководство за потребителя ..................................... 158
Інструкція з експлуатації ............................................166
Návod na obsluhu ....................................................... 174
Kasutusjuhend ............................................................. 182
Lietošanas pamācība ...................................................189
Käyttöohje ................................................................... 197
Упатство за работа ..................................................... 204
Navodila za uporabo ................................................... 212
Manuali i përdorimit .................................................... 220

Bosch C70 charger I Operating instructions EN
12
1 Charger
2Mounting hook
3Mains cable with mains connection
4Charging cable
a Plug
5Charging cable with clip
a Plug
6(+) Terminal clamp (red)
7(–) Terminal clamp (black)
8 Standby
9Mode selection button
10 Reverse polarity protection + -
11 Battery capacity indicator
Battery capacity: 100%
Battery capacity: 75%
Battery capacity: 50%
Battery capacity: 25%
12 Mode 1 | 12 V
(motorcycle/car)
13 Mode 2 | 12 V (charging at
0-4°C in winter or AGM)
14 Mode 3 | 12 V (maintenance)
15 Mode 4 | 12 V (regeneration)
16 Mode 5 | 12 V (voltage main-
tenance during battery
change)
17 Mode 6 | 24 V (truck)
18 Mode 7 | 24 V (charging at
0-4°C in winter or AGM)
Device description
(9)
(8)
(15) (12)
(17)
(11)
(13)
(18)
(14)
(16)
(10)
(1)
(5)
(6)
(5a)(4)
(7)
(3)
(2)
(5a)
(5a)
(4a)

ENBosch C70 charger I Operating instructions
13
1 Technical data
Technical data
Input voltage 230VAC / 50Hz
Starting current <50 A
Rated input current 
Input power 190 watts
Rated output voltage DC 12 V/24 V
Charging voltage 14.4 V/14.7 V (± 0.25 V),
28.8 V/29.4 V (± 0.6 V),
16.5 V/13.6 V (± 0.5 V)
Charging current 10 A (± 10 %),
5 A (± 10 %),
1.5 A (± 0.3 A)
Rated output current 10 A & 5 A
Reverse current < 5 mA (no AC input)
Protection rating IP65 (dustproof, waterproof)
Protection class II (double insulated)
Battery type 12 V & 24 V lead-acid battery (lead acid, EFB, GEL,
AGM and open VRLA)
Battery capacity 12 V: 14 Ah - 300 Ah, 24 V: 14 Ah - 120 Ah
Fuse (internal) 
Fuse (fuse holder) 
Noise level < 50 dB(A)
Temperature 0°C to + 40°C
Dimensions 215 x 112 x 65.4 mm (L x W x H)
1) The reverse current is the current that the charger consumes from the battery when no mains
power is connected.

Bosch C70 charger I Operating instructions EN
14
2 Safety
Please read these instructions carefully before using the charger.
ICAUTION
If the power supply cable is damaged, it must be replaced by the manufacturer or
service representative in order to avoid any danger.
Disconnect the power supply before making or breaking the connections to the bat-
tery.
The battery connection, which is not connected to the vehicle body, must be con-

black, away from the battery and fuel lines. Only then connect the battery charger to
the mains supply.
 -
connect the connection to the vehicle body (–) black and battery connection (+) red
in this order.
IWARNING
The mains plug must not come into contact with water. Water must be prevented from

IWARNING
Danger of explosion and re!
Explosive gases.
 
Provide adequate ventilation during the charging process.
Ensure that the area around the battery is well ventilated during the charging pro-
cess.
Battery
Use the battery charger only for 12 V 14 Ah - 300 Ah or 24 V 14 Ah - 120 Ah lead-acid
type (lead acid, EFB, GEL, AGM, open and VRLA) batteries.
IWARNING
Do not attempt to charge a non-rechargeable battery!

ENBosch C70 charger I Operating instructions
15
Keep children away from the charger.
This device can be used by children aged from 8 years and above and persons with
reduced physical, sensory or mental capabilities or lack of experience and knowledge
if they have been given supervision or instruction concerning the safe use of the de-
vice and understand the hazards involved.
Children must not be allowed to play with the device.
Cleaning and maintenance must not be performed by children without supervision.
For indoor use only.
Environmentally friendly disposal
Help protect the environment! Please observe the local regulations. Electrical devices
that are no longer usable must be collected separately and disposed of in an environ-
mentally friendly manner.
The packaging is made of ecological materials that can be disposed of in local recycling
plants.
3 Operation
3.1 Before initial start-up
1. Read the battery operating instructions before connecting the charger.
2. Follow the vehicle manufacturer’s recommendation if the battery is still connected to
the vehicle.
3. Clean the battery terminals. Do not allow the dirt to come into contact with your
eyes, skin or mouth. Wash your hands thoroughly after contact with the battery con-
nections.
4. Provide adequate ventilation. Gaseous hydrogen (oxyhydrogen) can escape from the
battery during charging and trickle charging.
3.2 Connection
1. Connect the (+) terminal (red) of the charger to the (+) terminal of the battery.
2. Connect the (–) terminal (black) of the charger to the (–) terminal of the battery.
3. The (–) terminal clamp (black) can also be connected to the vehicle body, but far
away from fuel lines.
Note: 
Only then connect the mains cable.
3.3 Terminating the connection
1. Put the charger into standby mode by pressing the mode button.
2. 
3. Disconnect the (–) terminal (black) of the charger from the (–) terminal of the bat-
tery.
4. Disconnect the (+) terminal (red) of the charger from the (+) terminal of the battery.

Bosch C70 charger I Operating instructions EN
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3.4 Overheating protection
If the device becomes too hot during the charging process, the output power and out-
put current are automatically reduced to prevent damage to the device.
3.5 Standby and reverse polarity protection
Mode Indicator Explanation
Standby Lights up during power on and in the event of faults
Reverse polarity protection Lights up when the terminal clamps are reversed
4 Mode selection
1. Select the desired mode by pressing the mode selection button.
2. The LED for the desired mode will light up.
3. If no further action is subsequently taken, the charging process will start after 5 sec-
onds.
Mode Output Indicator Operation Battery types1supported
Mode 1
Motorcycle/
car mode
14.4 V
10 A
Press the button once to se-
lect mode 1
LED 9 lights up
12 V lead acid, EFB and
most GEL batteries
Mode 2
12 V cold/
AGM mode
14.7 V
10 A
Press the button twice to
select mode 2
LEDs 9 and 11 light up
Cold state (0-4°C) of 12 V
lead acid, AGM, EFB and
GEL batteries.
Mode 3 mainte-
nance mode2
13.6 V
5 A
Press the button three times
to select mode 3
 
LED 9 lights up
12 V lead acid, EFB and
most GEL batteries
Mode 4
Regeneration
mode3
16.5 V
1.5 A
Press the button four times
to select mode 4,
 
LED 9 lights up
Suitable for the regenera-
tion of 12 V batteries af-
ter short-term extreme
discharge
Mode 5 voltage
maintenance
mode4
13.6 V

Do not connect a battery.
Press and hold the mode
button for 5s to switch to
mode 5
LED 2 and LED 9 light up
Can be used to supply
the vehicle electronics
without interruption when
changing the 12 V battery
(connection to the battery
terminals on the vehicle
side)
Mode 6
Truck 24 V mode
28.8 V /
5 A
Press the button once to se-
lect mode 6
LED 10 lights up
24 V lead acid, EFB and
most GEL batteries

ENBosch C70 charger I Operating instructions
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Mode Output Indicator Operation Battery types1supported
Mode 7
24 V cold/
AGM mode
29.4 V

Press the button twice to
select mode 7,
LEDs 10 and 11 light up
Cold state (0-4°C) of 24 V
lead acid, EFB and most
GEL batteries. And for
many 24 V AGM batteries
Note:
1) This charger is only valid for batteries with a battery capacity > 14 Ah.
2) The maintenance mode can be used to maintain the battery voltage if the battery is
not used for an extended period of time.
3) For regeneration mode, make sure that all connections between the battery and the
vehicle electrical system are disconnected.
4) For certain vehicles, it is important not to disconnect the vehicle electronics from
the power supply when changing the battery. In such cases, the power supply mode
can be used to supply power to the vehicle electronics during battery replacement.
If the load voltage is below 7.5 V, the charger will switch to standby mode. There is no
reverse polarity protection in this mode.
4.1 Pulse charging
This is an automatic charging function that cannot be selected manually.
Modes 1 & 2:
If the battery voltage is between 7.5 V (± 0.5 V) and 10.5 V (± 0.5 V) at the start of
the charging process, the charger will automatically switch to pulse charging.
Modes 6 & 7:
If the battery voltage is between 16 V (± 0.5 V) and 21 V (± 0.5 V) at the start of the
charging process, the charger will automatically switch to pulse charging.
4.2 Trickle charging phase
The charger has an automatic trickle charging phase with max. 800 mA at full charge.
4.3 Maintenance phase
When the battery is fully charged, “100%” LED lights up. The charger will start the
maintenance phase to keep the battery capacity in full condition.
4.4 Memory function
If the charger is disconnected from the mains during the charging process, the device
saves the previously selected mode. When reconnected to the mains and with the same
battery type (12V or 24V), the device will automatically start in the last mode.
Caution: If the connected battery type is different from the last one used (e.g. if you
were in cold/AGM mode last time and you need to connect a normal lead-acid battery
this time), please reselect the mode manually to avoid overcharging or damage.
There is no memory function for mode 3 (maintenance mode), mode 4 (regeneration
mode) & mode 5 (power supply mode).
4.5 Battery detection
-

Bosch C70 charger I Operating instructions EN
18
ternately. The charger will attempt to detect the battery voltage using an elaborate mea-
surement process. After 1-3 minutes, the charger will detect whether the battery is 12 V
or 24 V and switch to the corresponding 12 V motorcycle/car mode or 24 V truck mode.
4.6 Override mode
If the charger detects a connected battery as a 12 V battery and switches to 12 V
mode, but the user is very sure that the battery type is 24 V, the user can press and
hold the mode button for 5 seconds to switch the charger to any 24 V charging mode.
ICAUTION
The 24 V mode can charge the battery from a voltage as low as 5.5 V. As a result, a 12
V battery could be overcharged and cause further hazards (increased gassing, explo-

4.7 Device protection function
In the event of a short circuit on the charging cable, the fuse (4a) on the charging ca-
ble prevents damage to the device and the electrical system.
5 Maintenance and care
Always remove the mains plug from the socket before cleaning the charger. The
charger is maintenance-free.
1. Switch off the device.
2. Use a dry cloth to clean the plastic surfaces of the device.
3. Never use solvents or other aggressive cleaning agents.
4. To maintain operational safety, the devices must only be repaired by the manufactur-
er or its service representative using original spare parts.
5. 
6. For 6 V batteries, please use the C30, C40-Li or C80-Li.
For the EU version:
Robert Bosch GmbH
Auf der Breit 4
76227 Karlsruhe, Germany
Phone: [phone]
Email:
kundenberatung.kfztec[email protected]h.com
For the UK version:
Robert Bosch GmbH
Broadwater Park,
Uxbridge UB9 5HJ
Phone: [phone]
Email: [email protected]ch.com