The iPhone battery is a lithium Ion battery, so its ability to hold a charge will lesson over time. The slow degradation of the battery will not really be much of a factor for the average iPhone user, however certain factors like heavy usage, environmental conditions and other variables can cause your iPhone battery to die before the natural life span of the iPhone itself. This is not unique to the iPhone, but is a fact of life when using a lithium ion battery. Check this section of our website to find great deals on a backup iphone battery.
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