Conventional chargers and fast chargers can be used to charge the battery. The charging current should be in the range of 3-25 amperes, and the charging voltage should be in the range of 14-15.5 volts.
Charging should be done in a non-residential or well-ventilated area.
If the electrolyte level is too low, for example after a long stay in a region with a hot climate, top up the level with distilled water, see section "Maintenance".
If the car will not be used for more than six weeks, remove the battery and store it in a charged state. The most favorable storage temperature is from 0 to +27°C. At this temperature, the battery has the most favorable self-discharge rate. No later than after 3 months, recharge the battery, otherwise it will become unusable.
Clean the battery terminals regularly and rub with Vaseline or BOSCH terminal grease.
Charging the battery with a fast charger should only be used in exceptional cases, as this exposes the battery to very high current for a short time. Batteries that have been stored for a long time must not be charged with a fast charger.
Caution: Do not turn on the fast charger without simultaneously starting the engine with the starter.