4 General Operation
34 Trimble R6/R7 GPS and Trimble R8 GNSS Receivers User Guide
Trimble R7 GPS Receiver Operation
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WARNING – Avoid contact with the rechargeable Lithium-ion battery if it appears to be
leaking. Battery fluid is corrosive, and contact with it can result in personal injury and/or
property damage.
To prevent injury or damage:
– If the battery leaks, avoid contact with the battery fluid.
– If battery fluid gets into your eyes, immediately rinse your eyes with clean water and
seek medical attention. Do not rub your eyes!
– If battery fluid gets onto your skin or clothing, immediately use clean water to wash off
the battery fluid.
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.
48.1 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.
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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 V or less), the Trimble R7 GPS receiver is
designed to switch batteries or cease drawing power when the battery pack discharges
to 5.9 V.
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 before use.