Leica AT500 User Manual page 51

4.4
4.4.1
First-time use/
charging batteries
Operation/dischar-
ging
4.4.1.1
General
Power options
GEB364 Li-Ion
internal battery
GKL311 Single‑bay
Charger
Operation
Batteries
Operating Principles
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 a discharge/charge cycle
For Li-Ion batteries, a single discharge/charge cycle is sufficient. We
•
recommend carrying out the process when the battery capacity indic-
ated on the charger or on a Leica Geosystems product deviates signi-
ficantly 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.
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
0024617_001
The optional GKL311 Single-bay Charger can be used in the following ways:
Internally by 2 × GEB364 batteries fitted 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.
a
a GEB364 internal battery
b
b Electrical contacts
51