I received my extended battery today and it absolutely DOES NOT fit under the stock cover. Not in a million years could it ever be made to fit, it's HUGE. It comes with a new cover that adds a bump to the back of the phone where the battery is which sticks out a good sixty percent higher above the top of the stock case.
I really like the idea of the extended battery because I'm on the go a lot and use my phone constantly but this thing is enormous...I might use it for a few days and see if it's tolerable but I doubt it.
As of right now, my initial impression would have to be to PASS on buying this accessory.
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