HTC One or Sony Xperia ZR?

Guys which one would be better? I am a hardcore mobile internet user and also play games time to time, please suggest...

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My best friend got an HTC One four or five months ago. After the battery started draining too fast in the first couple of weeks, he returned the device. The store told him it was normal. If you use internet a lot or play games or watch videos - I woudn't go for the HTC One, although I am not sure whether the Xperia would be any better.

BTW, the strore did not say that the problem was a faulty battery as many users seem to have had the battery of their HTC Ones go bust in a couple of weeks from purchase.