Trimble Inc. 6848090 用户手册

2          Getting Started

1 6     SNB900 Radio-Modem User Guide

To charge the radio-modem’s internal battery, connect the unit to a 
15 Volt external power source and turn in on. If the SNB900 radio-
modem is turned off, the internal battery will not be charged. Trimble 
provides the recommended power supply (P/N 48800-00) in the 
SNB900 kit. 

The internal battery of the SNB900 radio-modem will gradually lose 
capacity over its life.  After approximately 500 charge/discharge cycles, 
the battery will be down to 80 % of its original capacity. After 750 cycles, 
the battery will have approximately 50 % of its original capacity.

This is true of all batteries. The cycles specified by Trimble are based on 
the battery manufacturer's specifications. After 500 cycles, the battery 
will still charge. However, the battery will not charge to full capacity. 

When the battery can no longer take or hold a charge, please arrange 
for an authorized Trimble service center to replace the battery. If the 
radio-modem is operating on external power and the unit is not being 
recharged, then the internal battery is not completing 
charge/discharge cycles and will therefore last much longer.

If users operate their SNB900 radio-modem for 200 days a year on only 
internal battery and recharge the unit each day, the radio-modem’s 
internal battery will reach the 500 cycle mark after about 2½ years.