PowerTech MB3906 User manual

Instruction Manual
8 Step Bluetooth®
Intelligent Lead Acid and
Lithium Battery Charger
MB3906

Table of Contents
Introduction 1
Part Description 2
Product Specifications 3
Box Contents 3
Safety Information 4
Product Features 7
Operation 8
Connection 9
Disconnecting 9
Select Charging Mode 9
Memory Function / Reset 10
Switching Between Modes 10
Automatic Detection of Battery 11
Recover 12V Mode 12
6V Lead-acid Battery Mode 12
12V (Motorcycle) Lead-acid Battery Mode 13
12V (Automotive) Lead-acid Battery Mode 13
Lithium 12.8V Mode 14
Special Functions 14
Bluetooth 15
Cleaning and Maintenance 18

Use for the intended purpose
The MB3906 is a battery charger with a pulse trickle charge mode and is
suitable for charging and maintenance charging of the following 6 V or 12 V
lead rechargeable batteries with Wet, Gel, AGM and 12.8V 4-cells LiFePO4:
• 6 V: with a capacity of 12 - 120 Ah
• 12 V: with a capacity of 1.2 - 12 Ah
• 12 V: with a capacity of 12 - 120 Ah
• Lithium (12.8V 4-cells LiFePO4): with a capacity of 8 - 50 Ah
You can also use it to regenerate completely discharged batteries. The battery
charger has protective circuits to prevent sparking and overheating. Any
incorrect or improper use leads to loss of the warranty. The manufacturer
takes no responsibility for damage(s) arising out of usage that is contrary to
the instructions laid down. The appliance is not meant for commercial use.
INTRODUCTION:
Please read these instructions for use carefully and completely, and take
note of all instructions and specifications.
SAVE THESE INSTRUCTIONS FOR FUTURE REFERENCE
1

2
PART DESCRIPTION:
1Bluetooth Logo
2MODE selction button
3Mode 1 (12V/0.9A)
4Mode 2 (12V/4.0A)
5Mode 3 (6V/4.0A)
6Mode 4 (6V or 12V cool situation)
7Mode 5
(12.8V 4-cells LiFePO4/3.0A)
8Mode 6 (12V/4.0A)
ACharging battery level:
1 bar (20%), 2 bars (40%), 3 bars
(60%), 4 bars (80%), 5 bars (90%),
Stops flashing fully charged.
BVOLT: The current voltage of
connected battery
CAMP: The charging current when
mode is selected
DIf flashing:
“Battery is not connected“
ENumbers: Shows value of the
current and voltage.
FIf flashing: “Battery Fault”
GIf flashing: “Incorrect Polarity“

3
PRODUCT SPECIFICATIONS:
BOX CONTENTS:
Input Voltage: 220 - 240 V ~ 50 Hz 0.6A
Power consumption: 65 W
Reverse current*: < 5 mA (no AC input)
Nominal output voltage: 6 V DC / 12 V DC / 12.8V DC
Nominal output current: 0.9 A / 4.0 A / 3.0 A
Charging voltage: 3 V / 7.4V for 6V battery, 14.5 V / 14.7V
for 12V battery, 14.5V for Lithium (12.8V
4-cells LiFePO4)
Charging current: 0.9 A ± 10 %, 4.0 A ± 10 %, 3.0 A ± 10 %
Battery type: 6V/12V lead-acid battery 12Ah - 120Ah
Lithium (12.8V 4-cells LiFePO4): with a
capacity of 8 - 50Ah
Housing protection type: IP 65 (dust-proof, water-proof)
Safety class: II
*Reverse current is the current used by the charging station battery, when
no mains current is connected.
Check the appliance and all accessories for damage immediately after
unpacking. Do not put a defective appliance or parts into operation.
• MB3906 Charger
• Clamps Cable
• Eyelet M6 Cable
• Instruction Manual

4
SAFETY INFORMATION:
DANGER!
Avoid danger to life and limbs caused by improper use!
CAUTION! Do not operate the appliance with a
damaged cable, power cord or plug.
Avoid danger to life and limbs caused by improper use!
PROTECT YOURSELF FROM AN ELECTRIC SHOCK!
When connecting the charging station, use a screwdriver
and a spanner with an insulated handle!
DANGER FROM ELECTRIC SHOCK!
• Do not operate the vehicle if you are charging a battery
while it is still in the vehicle! Switch o the ignition and
park the vehicle. Apply the parking brake (e.g. in cars)
or secure with a mooring rope (e.g. electric boat)!
• Disconnect the battery charger from the mains before
you make or break the connections to the battery.
1. First connect the clamp that is not connected to
vehicle bodywork, then connect the other clamp
to the vehicle bodywork at a point away from the
battery and the fuel line. After this is done, you can
connect the battery charger to the mains.
2. After charging, disconnect the battery charger from
the mains. Then disconnect the clamp attached to
the vehicle bodywork before you disconnect the
clamp from the battery.
• Handle the connecting cables (– and +) by their
insulated areas only!
• Ensure that there is complete protection from moisture
at the connections to the battery and at the mains
outlet socket!
• Carry out the mounting, maintenance and cleaning of
the battery charger only when it is disconnected from
mains!

5
SAFETY INFORMATION:
Do not leave small children unattended with the
battery charger!
• Children are too young to assess the possible dangers
associated with electrical devices. Children should be
supervised in order to ensure that they do not play with
the device.
• Children or persons who lack the knowledge or
experience to use the device or whose physical,
sensory or intellectual capacities are limited must never
be allowed to use the device without supervision or
instruction by a person responsible for their safety.
EXPLOSION HAZARD! Protect yourself from a highly
explosive oxyhydrogen gas reaction!
Gaseous hydrogen can leak from the battery during the
charging and discharging process. Oxyhydrogen gas is an
explosive mixture of gaseous hydrogen and oxygen. The
result is the so-called oxyhydrogen reaction upon contact
with open fire (flames, embers or sparks)! Carry out the
charging or discharging procedure in a well ventilated
room protected from the weather. Make sure that there are
no sources of open fire (flames, embers or sparks) in the
vicinity when charging or discharging batteries!
RISK OF EXPLOSION OR FIRE!
Ensure that the use of the battery charger cannot ignite
any explosive or combustible substances, e.g. petrol or
solvents!
EXPLOSIVE GASES! AVOID FLAMES AND SPARKS!
Ensure that there is adequate ventilation during the
charging process.
• Stand the battery on a well ventilated surface while
charging. Otherwise the device could be damaged.
• DANGER OF EXPLOSION! Ensure that the positive
terminal connection cable does not come into contact
with a fuel line (e.g. petrol line)!

6
SAFETY INFORMATION:
DANGER OF CHEMICAL BURNS! Protect your eyes and skin
against chemical burns caused by acid (sulphuric acid) upon
contact with the battery!
Wear: Acid-resistant glasses, clothing and gloves! If your eyes or
skin come into contact with sulphuric acid, rinse the aected part
of the body with plenty of clear running water and seek immediate
medical assistance!
• Avoid causing an electrical short-circuit when connecting the battery
charger to the battery. Connect the minus pole connecting cable only to
the minus pole of the battery or to the car body. Connect the plus pole
connecting cable only to the plus pole of the battery!
• Before connecting to the mains, make sure that the mains current is
equipped with standard 230 V ~ 50 Hz, PEN conductor, a 16 A fuse and a
residual-current circuit-breaker! Otherwise the device could be damaged.
• Do not place the battery charger near fire, heat, or subject it to prolonged
temperatures of over 50 °C! The output from the battery charger drops
automatically in high temperatures.
• Avoid damaging any lines carrying fuel, electricity, brake fluid, hydraulic oil or
water. Be particularly careful not to cause damage when mounting the charger
in place with screws! Failure to observe this advice risks loss of life or injury!
• Use only the supplied original manufacturer’s parts with the battery charger!
• Do not allow any objects to cover the battery charger! Otherwise the device
could be damaged.
• Protect the electrical contacts of the battery against short-circuiting!
• Use the battery charger only for charging and maintenance charging of
undamaged 6 V / 12 V lead batteries (wet cell or gel electrolyte)! Otherwise
damage to property could occur.
• Do not use the battery charger for charging or maintenance charging of
disposable batteries. Otherwise damage to property could occur.
• Do not use the battery charger for charging or maintenance charging of
damaged or frozen batteries! Otherwise damage to property could occur.
• Before connecting the charging station, read the information on battery
maintenance in the operating instructions of the battery! Otherwise personal
injury and / or damage to the device could occur.
• Before connecting the charging station to a battery permanently installed
in a vehicle, read the information on electrical safety and maintenance in
the operating instructions of the vehicle! Otherwise personal injury and / or
damage to the device could occur.
• Unplug the charger from the mains supply when not being used! This also
benefits the environment. Consider how much electricity is consumed, even
in standby mode.
• Remain alert at all times and always watch what you are doing. Always
proceed with caution and do not use the battery charger if you cannot
concentrate or feel unwell.
• Do not charge non-rechargeable batteries
• Max. operation temperature: 40ºC

7
PRODUCT FEATURES:
This appliance has been designed for charging a variety of SLA batteries
(sealed lead acid batteries), as mainly used in cars, motorbikes and several
other vehicles. They may be of types e.g. WET (with liquid electrolyte), GEL
(with mit gel-type electrolyte) or AGM (absorbed glass mat) batteries. A
special design of the appliance (also named “eight-phase-charging strategy“)
enables the recharging of the battery to almost 100 % of its original capacity.
Connecting the battery for a long period to the battery charger is also a
good way of ensuring that your battery is kept in optimum condition. The
“eight-phase-charging strategy” as follows:
Step 1: Check
Checks the battery voltage to make sure battery connections are good and
the battery is in a stable condition before beginning the charge process.
Step 2: Recovery
Initializes the Recovery process, if needed, for deeply discharged or sulfated
(desulfation) batteries by pulsing small amounts of current.
Step 3: Soft Start
Slow charge and protect for deeply discharged or sulfated (desulfation)
batteries by multi -phase of current.
Step 4-5: Bulk
The Bulk charging process continues using both a High Rate and Medium
Rate charge and returns 80% of battery capacity, Indicated by the 20%, 40%,
60%, 80% and 100% LCD.
Step 5: Absorption
Brings the charge level to 80%, The battery charger will deliver small
amounts of current to provide a safe, ecient charge and limit battery
gassing.

8
PRODUCT FEATURES:
OPERATION:
Step 6: Maintenance 1
Battery is fully charged and ready to use, indicated by the 100% CHARGE
LCD and the fact that the battery icon stops flashing. In this step, the battery
charger will only deliver enough current to keep the battery full. If the battery
tells the charger that more current is needed, the battery charger will switch
to Maintenance.
Step 7: Maintenance 2
Continuously monitors the battery voltage to determine if a maintenance
charge should be initiated. If the terminal voltage falls below 6.4V (6V) and
12.8V (12V), the charger will start the Maintenance cycle until voltage reaches
6.8V (6V) and 13.6V (12V) and then discontinues the charge cycle. The
cycle between Trickle and Maintenance is repeated indefinitely to keep the
battery at full charge, without overcharging. The battery charger can be left
connected indefinitely.
WARNING!
Before you carry out any work on the battery charger
always pull the mains plug out of the mains socket.
WARNING!
DANGER OF ELECTRIC SHOCK! DANGER OF DAMAGE
TO PROPERTY! DANGER OF INJURY!
Ensure that you do not strike electrical cables, gas or water
pipes when you are drilling into the wall. If necessary, check
the wall using a suitable detector before you drill.

9
CONNECTION:
DISCONNECTING:
SELECT CHARGING MODE:
• Before starting the charging or discharging procedure on a permanently
installed battery in a vehicle, first disconnect the minus pole connecting
cable (black) of the vehicle from the minus pole of the battery. The
minus pole of the battery is usually connected to the car body.
• Then disconnect the plus pole connecting cable (red) of the vehicle
from the plus pole of the battery.
• First attach the “+“ quick-release clamp (red) of the battery charger to
the “+“ terminal of the battery.
• Attach the “–“ quick-release clamp (black) of the battery charger to the
“–“ terminal of the battery.
• Connect the mains lead of the battery charger to an electrical power
outlet socket.
You can select dierent charging modes for charging dierent batteries at
dierent ambient temperatures. In comparison with conventional battery
charging stations, this appliance has a special function for reusing an
empty battery or rechargeable battery. You can recharge an empty battery
/ rechargeable battery. Safe charging is ensured by means of a protection
function against incorrect connection and short circuiting. Due to the
installed electronics, the charging station does not begin operation directly
after connecting the battery, but only starts after a charging mode has been
selected.
This avoids sparking, which often occurs when connecting. The battery
charger is controlled by an internal MCU (Micro-Computer Unit).
• Disconnect the appliance from the power supply.
• Detach the “–“ quick-release clamp (black) from the “–“ terminal of
the battery.
• Detach the “+“ quick-release clamp (red) from the “+“ terminal of
the battery.
• Reconnect the plus pole connecting cable of the vehicle to the plus
pole of the battery.
• Reconnect the minus pole connecting cable of the vehicle to the
minus pole of the battery.

10
MEMORY FUNCTION / RESET:
SWITCHING BETWEEN MODES:
After connection to mains, the charger automatically returns to the last
charge mode used. If the charger stays on “STANDBY” press the mode key.
Press the MODE selection button the appropriate number of times.
The device switches between charging modes in the following order for
12V battery:
Standby > MODE 1 > MODE 1 & 4 and >
MODE 2 > MODE 2 & 4 and > then repeats the cycle.
The device switches between charging modes in the following order for 6V
battery:
Standby > MODE 3 > MODE 3 & 4 and > then repeats
the cycle.
Long press 3 sec. the MODE selection button the appropriate number of
times. The device switches between charging modes in the following order:
Standby > MODE 5 > MODE 6 > then repeats
the cycle.
NOTE:
• MODE 5 : If voltage of the battery is out of 11.6-13.8V, Mode 5
is not available, will go to MODE 6 directly.
• MODE 6: Repair & Recover and charging the deeply discharged or
sulfated (desulfation) 12V batteries.
• If you press the selector button, charging mode automatically switches
over to the next mode and begins operation in that mode.

11
AUTOMATIC DETECTION OF BATTERY:
As soon as the battery charger has been connected to the mains, the charger
recognizes the battery based on the following criteria: If the battery voltage is
lower than 2.0 V or higher than 14 V, the battery is not suitable or defective.
The error message appears and flashing on the display.
NOTE:
Depending on the charging condition of the battery, the charger adapts the
charging currents to ensure optimum charging of the battery. Only during
the main charging phase, the battery is charged with the maximum charging
current. Shortly before the maximum charging capacity has been reached
the charging current is reduced. This ensures a gentle and best possible
charging up to the battery’s maximum capacity.
6 V Battery:
If the battery voltage is between 2.0 and 7.0 V, the battery is identified as a
6 V battery. By pressing the MODE key the 6 V charging program is started.
12 V battery:
If a battery voltage of between 7.0 V and 10.5 V is measured, this indicates
a critical range as at the lower voltage end. It is not clear whether it is a
fully charged 6 V battery (which could have a voltage of 7.0 V) or a deep-
discharged 12 V battery, the Step 2 Recovery will start by pulsing small
amounts of current. If the battery voltage does not rise to 10.5 V within
2 hours, the error message appears and flashing on the display and
returning to the standby mode.

12
RECOVER 12V MODE 14.7V 4.0A: REACTIVATION OF
DEEPDISCHARGED 12 V BATTERIES USING PULSE CHARGING
This mode is mainly suitable for charging 12 V lead-acid batteries with a
capacity greater than 12 Ah. Long press 3 sec. the MODE selection button, if
the measured voltage is between 2.0 V and 14 V the battery is identified as a
12V battery to activate mode.
Then if you do not take any further action, the electronic system will
automatically start the charging process together with the LCD display will
flash at (with a current of) 2.0A. If the process runs without any problems,
the LCD display will show the battery charging (bars will start flashing) until
the battery is charged. When the battery is fully charged, the battery icon
should be full and will stop flashing. The device now switches automatically
into maintenance charging mode. The battery voltage has not risen to 12V
after 3 hours, The error message appears and flashing on the display
and returning to the standby mode.
6V OR 6V MODES (7.3V 4.0 A / 7.4V 4.0A):
This mode is mainly suitable for charging 6V lead-acid batteries with a
capacity greater than 12 Ah.
Press the MODE selection button to select MODE or .
After doing so, the corresponding LCD display or lights up.
Then if you do not take any further action, the electronic system will
automatically start the charging process together with the LCD display will
flash at (with a current of) 4.0A. If the process runs without any problems,
the LCD display will show the battery charging (bars will start flashing) until
the battery is charged. When the battery is fully charged, the battery icon
should be full and will stop flashing. The device now switches automatically
into maintenance charging mode.

13
OR MODES (14.5V 0.9 A / 14.7V 0.9A):
OR MODES (14.5V 4.0 A / 14.7V 4.0A):
This mode is suitable for charging 12 V lead-acid batteries with a capacity
less than 12 Ah.
Press the MODE selection button to select MODE or .
After doing so, the corresponding LCD display or lights up.
Then if you do not take any further action, the electronic system will
automatically start the charging process together with the LCD display will
flash at (with a current of) 0.9A. If the process runs without any problems,
the LCD display will show the battery charging (bars will start flashing) until
the battery is charged. When the battery is fully charged, the battery icon
should be full and will stop flashing. The device now switches automatically
into maintenance charging mode.
This mode is mainly suitable for charging 12 V lead-acid batteries with a
capacity greater than 12 Ah.
Press the MODE selection button to select MODE or .
After doing so, the corresponding LCD display or lights up.
Then if you do not take any further action, the electronic system will
automatically start the charging process together with the LCD display will
flash at (with a current of) 4.0A. If the process runs without any problems,
the LCD display will show the battery charging (bars will start flashing) until
the battery is charged. When the battery is fully charged, the battery icon
should be full and will stop flashing. The device now switches automatically
into maintenance charging mode.

14
LITHIUM 12.8V MODE (14.5V 3.0A):
Long press 3sec. the MODE selection button, if the measured voltage is
between 11.6 V and 13.8 V the battery is identified as a Lithium (12.8V 4-cells
LiFePO4) to activate mode.
Then if you do not take any further action, the electronic system will
automatically start the charging process together with the LCD display will
flash at (with a current of) 3.0A. If the process runs without any problems,
the LCD display will show the battery charging (bars will start flashing) until
the battery is charged. When the battery is fully charged, the battery icon
should be full and will stop flashing. The device now switches automatically
into maintenance charging mode.
0V battery charging.
This feature is used for zero volt batteries; it uses a very small pulse current
to sense the connection of the battery. This function is used in lithium
batteries, as lithium battery pack has Protection Circuit Modules (PCM),the
battery pack output is 0V when the PCM have actioned.
Overheating protection
If the appliance becomes too hot during charging, the power output is
automatically reduced. This protects the appliance from damage.
Trickle charging
Once the battery has been fully charged, the charger automatically changes
to trickle charging. Depending on the measured voltage, the charging is
interrupted or the battery is maintained in a fully charged condition with low
voltage currents (0.9A or 0.4A / 0.05A).
NOTE: a battery can remain permanently connected to the charger without
damage or adverse eect on its performance. The trickle charge can be used
to maintain a battery.
SPECIAL FUNCTIONS:

15
BLUETOOTH:
Download and setup the “MW BT Check & Charge” APP software from
Apple Store or Google Play first.
1. Connect charger to MAINS. Make sure unit is powered on. Control panel
“Power LED” lights should be on at this stage.
2. Turn on Bluetooth on desired hand held device or laptop.
3. Open “ProUser Check & Charge” Apps and press “select” language and
set desired language option.
4. Select Battery Charger Model connected to battery to be charged. There
are several model options. Input B/T password 123456 to connect.
5. Once Apps detects model being used to charge battery, it will show
process status
6. If there exists any problem with the connection of the charger to the
battery, (reverse polarity), or if the battery is beyond recovery, (dead
battery), an ERROR message will appear to indicate situation.
7. After ERROR message has been dealt with and there is no issue
preventing the charging process, the monitor will show the active process.
8. Choose “6V Mode” “Motorcycle” or “Car Mode”.
9. You may also choose “Cold” mode for cold environment or “Recover”
mode for depleted battery.
10. You may opt to input ON/OFF command to stop charging or to proceed
with charging process.

16
MOBILE APPLICATION USER INTERFACE:

17
MOBILE APPLICATION USER INTERFACE: