User's Manual

Trimble R7/R8 GPS Receiver User Guide 47
General Operation 4
Trimble R7 GPS Receiver Operation
Each receiver in your system is supplied with two internal Lithium-ion
battery packs. To charge both sets of batteries, connect both receivers
to power supplies as shown in Figure 3.2.
47.1 Battery charging and storage
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.
C
WARNING – Charge and use the rechargeable Lithium-ion battery only in
strict accordance with the instructions. Charging or using the battery in
unauthorized equipment can cause an explosion or fire, and can result in
personal injury and/or equipment damage.
To prevent injury or damage:
– Do not charge or use the battery if it appears to be damaged or leaking.
– Charge the Lithium-ion battery only in a Trimble product that is
specified to charge it. Be sure to follow all instructions that are provided
with the battery charger.
– Discontinue charging a battery that gives off extreme heat or a burning
odor.
– Use the battery only in Trimble equipment that is specified to use it.
– Use the battery only for its intended use and according to the
instructions in the product documentation.
Charging the Lithium-ion battery
The rechargeable Lithium-ion battery is supplied partially charged.
Charge the battery completely before using it for the first time. If the
battery has been stored for longer than six months, charge it before use.
To protect the battery from deep discharge (5 volts or less), the
Trimble R7 receiver is designed to switch batteries or cease drawing
power when the battery pack discharges to 5.9 volts.