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3.5 Batteries
3.5.1 Operating Principles
Charging / first-
time use
• The battery must be charged prior to using it for the first time because it
is delivered with an energy content as low as possible.
• The permissible temperature range for charging is between 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 GeoMax, it is not possible to charge the battery
if 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 indi-
cated on the charger or on a GeoMax product deviates significantly form
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.
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