Kalkhoff Derby Cycle Werke GmbH 2011 User Manual - 6   Battery

20 

III User Manual Pedelec with centre motor

6   Battery 

Your battery is a lithium cobalt battery, the ideal type of 

lithium-ion (Li-ion) battery for this application. One of the 

main benefits of this type of battery is its low weight com-

bined with a high capacity. Li-ion batteries only weigh half 

as much as comparable nickel metal hybride or nickel-cad-

mium batteries. This means you carry less battery weight 

and more battery power. 

6.1   Straightforward  charging

›

There is no memory effect. You can therefore fully 

recharge your battery after every trip. 

›

Recharge the battery after every trip. This means 

you can set off immediately the next time you use 

your bike and you also increase the service life of 

the battery.

›

If you are not using the battery, you must recharge 

it after 6 months at the latest. 

6.2   High degree of safety due to battery 

management

›

The battery cannot be damaged as a result of a 

short-circuit. If this were to happen, the battery 

management would switch off the battery. 

›

You can simply leave the battery standing in the 

charger as it prevents overcharging.

6.3   Straightforward  storage

›

If you do not need your battery for a while, store it 

at a temperature of +10 °C at three quarters of its 

full charge capacity. 

›

The battery enters sleep mode to prevent it from 

totally discharging. 

›

These benefits are available due to highly effective 

battery management that has been adapted to this 

specific application and by tuning the battery for 

operation with a 250 watt motor. 

Observe the following points to increase the service 

life of your Pedelec battery: 

›

Make sure that the battery is fully charged before 

you ride your bike for the first time or after you 

have not used it for a while. 

›

You should run the battery all the way down to 

empty for the first three charging cycles. This al-

lows the battery to reach its maximum capacity.

›

If you continuously run the battery to empty during 

normal operation, this reduces its service life. 

›

If you partially recharge the battery frequently dur-

ing normal operation, this has a favourable effect 

on its service life. 

›

You should therefore partially recharge the battery 

whenever possible: Try not to run the battery all 

the way down to empty and recharge it even after a 

short period of operation.

›

In the as-delivered condition, the battery is not 

fully charged and is in what is referred to as sleep 

mode. Sleep mode minimises the rate at which the 

battery discharges itself. If the battery is allowed 

to discharge unchecked for an extended period this 

can lead to total discharging which damages the 

battery. To "wake up" the battery, simply place it in 

the charger for one minute. 

›

If you are having problems with the battery, place 

it in the charger for one minute. A reset occurs, 

during which the battery management disables 

sleep mode for example. After this, the battery will 

work again. 

›

Ideally you should charge the battery at a tempera-

ture of between +10 °C and +30 °C. It takes longer 

to charge the battery at low temperatures, the 

battery will not charge up at temperatures higher 

than +30 °C. Ideally, you should charge and store 

the battery inside your house or in a warm garage 

when the outside temperature is low. In this case 

you should only fit the battery on your bike just 

before using it. 

›

If you are transporting your Pedelec by car, take 

the battery out of its holder and transport it 

separately.

›

The battery should ideally be stored for longer 

periods charged to 75% of its capacity at a tem-

perature of +10°C.