5700/5800 GPS Receiver User Guide 141
General Operation 14
5800 Operation
If an external power source is connected to Port 1 it is used in
preference to the internal battery. When there is no external power
source connected, or if the external power supply fails, the internal
battery is used.
The 5800 receiver is supplied with two rechargeable lithium-ion
batteries, and a dual battery charger. The two batteries charge
sequentially and take approximately four hours each to fully charge.
147.1
Battery charging and storage
Note – All battery types discharge over time when they are not being
used. Batteries also discharge faster in colder temperatures. If a
lithium-ion battery is to be stored for long periods of time, make sure it
is fully charged before storing and re-charged at least every three
months.
To protect the battery from deep discharge (5 volts or less), the 5800
system is designed to switch batteries or cease drawing power when
the battery pack discharges to 5.9 volts.
A battery that has reached the deep discharge level cannot be
recharged and must be replaced. The following recommendations
provide optimal performance and extend the life of your batteries:
• Fully charge all new batteries prior to use.
• Do not allow the batteries to discharge below 5 volts.
• Keep all batteries on continuous charge when not in use.
Batteries may be kept on charge indefinitely without damage to
the receiver or batteries.
• Do not store batteries in the receiver or external charger unless
power is applied.
If you must store the batteries, fully charge them before storing and
then recharge them at least every three months.
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