Support and General Use > Hardware
Selective battery charge on Sansa AMS, to prolong overall battery life?
oid_maps:
--- Quote from: saratoga on September 29, 2014, 03:05:07 PM ---
--- Quote from: oid_maps on September 29, 2014, 02:49:41 PM ---is it possible on Sansa AMS devices to not automatically charge when plugged into USB?
--- End quote ---
I don't think so.
--- Quote from: oid_maps on September 29, 2014, 02:49:41 PM ---Reason:
LiIon-batteries age by charging cycles. Also partly charging counts (almost) as a charging cycle. So, to prolong the life of the battery, it makes sense to only charge when the battery is almost empty.
--- End quote ---
No, this is backwards. Frequent shallow cycles are much less damaging than less frequent deep cycles.
--- End quote ---
There is one more thing to that -- if the device is not used regularly. Since LiIon-batteries age also by just storing them, and the aging goes quicker the more energy they have stored (e.g. the more they are charged) -- that's why you should store them only half to 1/3 charged. So, if the device is used irregularly (which means most of the time it is just stored), it may prolog overall battery life if it is not fully re-charged after each usage.
Two URLs about that (quick googling):
http://www.mpoweruk.com/storage.htm
http://batteryuniversity.com/learn/article/how_to_store_batteries
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