Batteries: Operating Principles 4.5.1

First-time use/charging batteries 

• The battery must be charged before using it the first time, because it is delivered with an energy content as low as possible or might be in sleep  mode.

• The permissible temperature range for charging is from 0 °C to +40 °C/ +32 °F to +104 °F. For optimal charging, we recommend charging the batteries at a low ambient temperature of +10 °C to +20 °C/+50 °F to +68 °F if possible

• It is normal for the battery to become warm during charging. Using the chargers recommended by Leica Geosystems, it is not possible to charge the battery once the temperature is too high

• For new batteries or batteries that have been stored for a long time(> three months), it is effectual to make only one charge/discharge cycle

• For Li-Ion batteries, a single discharging and charging cycle is sufficient. We recommend carrying out the process when the battery capacity indicated on the charger or on a Leica Geosystems product deviates significantly from the actual battery capacity available.

Operation/discharging 

• The batteries can be operated from −20 °C to +55 °C/−4 °F to +131 °F.

• Low operating temperatures reduce the capacity that can be drawn; high operating temperatures reduce the service life of the battery.