Bosch GLM100-23 Operating/Safety Instructions Manual page 12

Preparation
Inserting/Replacing the Batteries
AAA Alkaline batteries are recommended for the measuring
tool.
To open the battery lid 3, press the latch 4 in the direction
of the arrow and remove the battery lid. Insert the batteries.
When inserting, pay attention to the correct polarity
according to the representation on the inside of the battery
compartment.
When the battery status indicator a
is empty and
starts blinking for the first time, operating the tool (incl.
measurements) is still possible for approx. 15min. When
batteries are empty, the tool switches off.
Always replace all batteries at the same time. Only
use batteries from one brand and with the identical
capacity.
Remove the batteries from the tool when not using it for
extended periods. When storing for extended periods, the
batteries can corrode and discharge themselves.
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