Samsung SCH-8500 - Manual (Page 131)

To avoid damage, do not store the batteries at
temperatures below -4° F or higher than 185° F and avoid
leaving the batteries unused for very long periods of time
without periodic charging. Follow these storage rules:
Less than one month:
-4° F to 140° F (-20° C to 50° C)
More than one month:
-4° F to 113° F (-20° C to 35° C)
Note: Damage can occur to Lithium Ion (Li-Ion) batteries if
left uncharged. Li-Ion batteries should not be left with a
charge level below 30%. Fully charge your Li-Ion battery prior
to storing and periodically recharge your Li-Ion batteries.
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You must follow these instructions when disposing of or
recycling the battery:
Do not dispose of the battery in a fire; the cell may
explode. You must follow the regulations in your area
regarding disposal of batteries.
Do not open or puncture the battery; the released
electrolyte is corrosive and may cause damage to the
eyes and skin, and can be toxic if swallowed.
Charge the battery in accordance with the instructions
specified in this user guide. See “Charging the battery”
on page 23.
Return unwanted Samsung Lithium Ion batteries to your
nearest Samsung Service Center. (Call toll free
1-888-987-HELP (4357) in the U.S.)