No. of Recommendations: 2
Apple will replace the battery if it drops below 50% of its original capacity.

I have AppleCare on the iPhone. This battery problem occurred after I upgraded to iOS6...shoulda said that. Just what would 50% drop mean exactly?

I am guessing it refers to the charge the battery can hold. Over time, the charge that batteries hold declines. Apple is saying that if the maximum charge goes below 50% of the original amount while the phone is under warrantee they will replace it.

I could not find any apps for the iPhone that shows how much charge the battery holds. I did find sites that said that a genius could quickly test it at an Apple store. So if you suspect your battery is not holding the charge that it should, you could take it in and have it tested.

For laptops, you can monitor your battery with coconutbattery ( My 3.5 year old MacBook Pro battery, for example, shows 86% capacity (3965 mAh current capacity vs. 4600 mAh design capacity).
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