Caring for the battery, Protecting your battery, Disposal of lithium ion (li-ion) batteries – Samsung A640 User Manual
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Section 4A: Important Safety Information
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Caring for the Battery
Protecting Your Battery
The guidelines listed below help you get the most out of your battery’s 
performance.
ⅷ
Recently, there have been some public reports of wireless phone 
batteries overheating, catching fire, or exploding. It appears that 
many, if not all, of these reports involve counterfeit or inexpensive, 
aftermarket-brand batteries with unknown or questionable 
manufacturing standards. Sprint is not aware of similar problems with 
Sprint PCS® phones resulting from the proper use of batteries and 
accessories approved by Sprint or the manufacturer of your phone. 
Use only Sprint- or manufacturer-approved batteries and accessories 
found at Sprint Stores or through your phone’s manufacturer, or call 
1-866-343-1114 to order. They’re also available at 
www.sprint.com
–
click the
Wireless
link under
Personal
, and then click
Accessories
under
Shop the Sprint PCS Store Online
. Buying the right batteries and
accessories is the best way to ensure they’re genuine and safe.
ⅷ
In order to avoid damage, charge the battery only in temperatures that 
range from 32° F to 113° F (0° C 
to 45° C).
ⅷ
Don’t use the battery charger in direct sunlight or in high humidity 
areas, such as the bathroom.
ⅷ
Never dispose of the battery by incineration.
ⅷ
Keep the metal contacts on top of the battery clean.
ⅷ
Don’t attempt to disassemble or short-circuit the battery.
ⅷ
The battery may need recharging if it has not been used for a long 
period of time.
ⅷ
It’s best to replace the battery when it no longer provides acceptable 
performance. It can be recharged hundreds of times before it needs 
replacing.
ⅷ
Don’t store the battery in high temperature areas for long periods of 
time. It’s best to follow these storage rules:
Less than one month:
-4° F to 140° F (-20° C to 60° C)
More than one month:
-4° F to 113° F (-20° C to 45° C)
Disposal of Lithium Ion (Li-Ion) Batteries
For safe disposal options of your Li-Ion batteries, contact your nearest 
Sprint authorized service center.
Special Note:
Be sure to dispose of your battery properly. In some areas,
the disposal of batteries in household or business trash may be prohibited.