Thread: New, genuine battery question
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retsaw is offline retsaw
2010-12-14 , 19:11
Posts: 701 | Thanked: 585 times | Joined on Sep 2010 @ London, England
#14
Originally Posted by storkus View Post
1. Li-ion batteries age whether you use them or not. At 3 years old from manufacture, they have roughly half their capacity before further subtracting more life due to cycling (which they don't like either), and any N900 or smart phone battery will see LOTS of cycling! My laptop's battery is experiencing this right now as it appears to be approaching 3 years old. Bottom line: if you buy a new battery, try to find out the actual manufacture date of the cell inside.
That can be true but it depends on how the battery is stored. What you said is true if the battery is stored fully charged at 25°C, but if it was stored at 40% charge it will have 88% of original capacity after 3 years at 25°C, this capacity loss can be further reduced by storing at cooler temperatures. Read the Wikipedia article for some information on this.