User's Manual

4.4 Batteries
4.4.1 Operating Principles
•
The battery must be charged before using it the rst 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 a discharge/charge cycle
•
For Li-Ion batteries, a single discharge/charge cycle is sufcient. We
recommend carrying out the process when the battery capacity indic-
ated on the charger or on a Leica Geosystems product deviates signi-
cantly from the actual battery capacity available.
• 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.
4.4.1.1 Power Concept
Use the batteries, chargers and accessories recommended by Leica Geosys-
tems to ensure the correct functionality of the instrument.
Power for the instrument can be supplied either internally or externally.
AT500 instrument
Internally by 2 × GEB364 batteries tted into the
battery compartment, or externally by the AC power
supply. The AC power supply can be also used to
charge the two internal batteries while the instru-
ment is powered off.
0024617_001
a
b
a GEB364 internal battery
b Electrical contacts
The optional GKL311 Single-bay Charger can be used in the following ways:
First-time use/
charging batteries
Operation/dischar-
ging
General
Power options
GEB364 Li-Ion
internal battery
GKL311 Single‑bay
Charger
Operation 51