[opendoor]

Originally Posted by Old Yeller

Even without power managers I can get a full day of heavy use out of my phone... also it helps that on ebay 3 batteries and a separate charger are a whole $10:

http://www.ebay.ca/itm/3-x-2900mAh-b...44955808788285

I'd be wary about using crap like that in a $600 phone. While rare, cheap knock offs like that can sometimes damage hardware, as poorly made Li-Ion batteries have been known to leak and cause problems. Usually they're fine, but eBay is often the worst of the worst for that kind of stuff.

I also believe you lose NFC functionality without the proper battery.