User's Manual Part 2
Draft
140 RT System 2 v2.3.0 Deployment Guide R01.b
© 2010-2013 Wireless Seismic, Inc. All rights reserved.
7. Batteries
Charging Lithium Ion Batteries
Routinely check the battery’s charge status
Consider replacing the battery with a new one if you note either of the following
conditions:
● The battery run time drops below about 80% of the original run time
● The battery charge time increases significantly
7.2 Charging Lithium Ion Batteries
7.2.1 Charging Precautions
Observe the following charging precautions:
Prior to charging, inspect the battery for any visible damage to the case or connector
that could create an electrical shortage.
The temperature range over which the battery can be charged is 0°Cto+45°C. Charging
the battery outside of this temperature can cause the battery to become hot or to break.
Be absolutely sure that only a 5 V source is used when charging the battery.
Care should be taken to charge batteries on a fireproof surface.
Do not charge batteries near flammable items or liquids.
Keep a Class C Dry Chemical fire extinguisher nearby.
Do not continue recharging the battery if it does not recharge within the specified
charging time.
A lithium ion battery should NEVER be left unattended while charging.
7.2.2 Battery Charger
The lithium ion battery charger is designed to operate from a single 10 A, 120 VAC service
line.