Manual MODSTER EC-135
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leave the battery unattended during the charging-discharging process or during
operation�
• Read the charger instructions carefully before charging�
• Do not charge batteries which are strongly heated or undercooled� Allow batteries
to cool down to approx� 20-30°C or warm them up before charging�
• Only cells of the same capacity and make may be charged together�
• Make absolutely sure that the polarity of the batteries is correct and prevent
short-circuits, especially through non-insulated connector systems�
• In case of contact with water or penetration of moisture into the battery, there is a
risk of explosion due to short-circuiting�
• Do not charge with reverse polarity�
• Do not solder directly to the battery�
• Do not modify or open battery�
• Do not charge batteries above 4�2 volts (+/-0�05V) per cell and do not discharge
below 3 volts per cell�
• Charge batteries only with suitable lithium battery chargers with connected or
built-in equalizer/balancer, never connect directly to a power supply�
• Do not use the battery in locations subject to high static discharge�
• All this can cause the battery to be damaged, explode or catch fire�
• Never charge batteries unattended!
• Never charge, store or keep the battery in the model or inside a car�
Charging procedure
Only use chargers that have been expressly approved by the manufacturer for use
with lithium batteries� Lithium batteries can only be charged using the CC-CV charging
procedure� Make sure that the charger is correctly selected� In the first charging pha-
se, the charger keeps the charging current constant� With a charging current of 1C and
a discharged battery, this first phase takes approx� 50- 60 minutes� A battery capacity
of approx� 80-90% is charged� When the end-of-charge voltage of 4�2 volts/cell is rea-
ched, only the voltage is kept constant and the charge current drops� A further 35-40
minutes are required to charge the remaining capacity� If the value reaches the lower
current limit of approx� 5-10% of the specified charging current, the charging process is
switched o by the charging device� At a charge rate of 1C, this means that the entire
charging process takes approx� 90 minutes when the battery is discharged� A lower
charging current of 0�3-0�5 C is recommended for the first charging process� This mea-
sure facilitates balancing and increases the service life of the battery�
Voltage sensor cable
Due to dierent cell temperatures during the discharge process, the individual cells
gradually acquire dierent charge states and voltage levels� The total charge voltage
applied is then not distributed evenly across the individual cells, which means that
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