Microsoft Corporation HS-121W User Manual

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B a t t e r y   i n f o r m a t i o n
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lifetime. If left unused, a fully charged battery will lose its 
charge over time.
Always try to keep the battery between 15°C and 25°C (59°F 
and 77°F). Extreme temperatures reduce the capacity and 
lifetime of the battery. A device with a hot or cold battery 
may not work temporarily. Battery performance is 
particularly limited in temperatures well below freezing.
Do not dispose of batteries in a fire as they may explode. 
Batteries may also explode if damaged.
Never use any charger that is damaged.
Important: Operating times are estimates only 
and depend on network conditions, features used, 
battery age and condition, temperatures to which 
battery is exposed, and many other factors.
HS-121W_UG_en1_with_FCC&IC_notice.fm  Page 17  Thursday, May 8, 2008  12:02 PM