Sprint Nextel IC902 User Manual

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Your display screen lets you know the battery is charging. 
Both the battery icon 
 and a text message show the 
charging status.
Battery Use and Maintenance
Sprint-approved Li-Ion chargers provide optimum 
performance. Other chargers may not charge the Li-Ion 
battery, only partially charge it, or may yield a reduced 
number of lifetime charge cycles 
Extreme temperatures degrade battery performance. Do 
not store the battery where temperatures exceed 140°F 
(60°C) or fall below -4°F (-20°C).
Li-Ion batteries have a self-discharge rate and, without 
use, lose about 1% of their charge per day.
Tip:
You can also charge your phone using a Motorola-approved 
USB cable and a computer that supports charging through its 
USB port. You can only use a Motorola-approved USB cable.