Bosch GLM 100 C Operating/Safety Instructions Manual page 21

The charging procedure begins as soon as the main plug of the battery
charger is plugged into the socket outlet and the charger connector 22 is
plugged into the tool's Micro-USB socket 15.
The battery charge control indicator g indicates the charging process.
During the charging procedure, the segments flash one after the other.
When all segments of the battery charge control indicator g are displayed,
the battery is completely charged.
Disconnect the battery charger when not using it for longer periods of time.
Additionally, the battery can also be charged via a USB port. For this,
connect the measuring tool to a USB port using the micro USB cable. In
USB operation (recharging, data transmission), the charging operation can
be significantly prolonged.
The measuring tool cannot be used independently during the charging
procedure. Usage is possible only in combination with a USB connection
and the available software.
devices are interrupted. This can lead to data loss.
The measuring tool cannot be used during the charging procedure.
Store the measuring tool with self-contained battery within the allowable
temperature range, see "Technical Data". As an example, do not leave the
measuring tool within a vehicle in the summer.
A significantly reduced working period after charging indicates that the
battery life is significantly diminished and must be replaced.
The Bluetooth ® function switches off during the
charging procedure. Existing connections to other
Recommendations for Optimal
Handling of the Battery
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