Discharging the battery at [FONT=Arial, Helvetica, sans-serif]86°F reduces its life by 20%. At [FONT=Arial, Helvetica, sans-serif]104°F, that goes up to a 40% loss in lifetime. Optimum discharge temperature is [FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif]68°F[/FONT][/FONT][/FONT].
[FONT=Arial, Helvetica, sans-serif]The allowable discharge temperature range is –4°F to 140°F[/FONT], with the lifetime of the battery reduced as you get above [FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif]68°F or below about [FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif]55°F[/FONT][/FONT][/FONT][/FONT][/FONT][/FONT][/FONT][/FONT][/FONT][/FONT].
It it normal? [FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif]80°F[/FONT][/FONT][/FONT][/FONT][/FONT] is just a bit higher than most phones operate at. [FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif][FONT=Arial, Helvetica, sans-serif]97°F[/FONT][/FONT][/FONT][/FONT][/FONT] is too hot to get long life, and with a non-removable battery, lifetime is especially important. (Even if it's only $45 plus shipping and insurance to have the battery replaced, you're without a phone for a while.)
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