QCell battery. 12-13 hours when I used to get 4 or 5 hours with MY normal usage. Only 20 bucks and has a nice glossy cover to the battery case. Most users should easily get 24 hours out of this one. Ive gotten 20 on a moderate use day. As long as it makes it through the day without carrying extra battery, its good enough
Highly recommend the QCell battery from Amazon. Only had it a month but I go all day without recharging with moderate use. Would probably be like 2 days if not for the high battery drain on FF18 (Wifi drain sucks but need wifi on as I have no 3g at work). Stock battery would only last 6 hours.
Is there any extended battery that doesn't' look hideous?
2500 mah is good trade-off. Greater power than stock battery but not as "monstrous" as 3800 and higher batteries. Slight rise on battery cover makes for better handling imo. I'm running OTA ICS with daily use between moderate and heavy 14-16 hours daily. After conditioning 2-3 cycles, one charge carries me thru the day and well into night with power to spare. Found mine on ebay from US seller.
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Why not get some spare normal sized batteries and one of the cool Anker charge spare while charging phone combo's. I think I bought 3 spare and the charger for less than $20. I hate the phone with the big battery and slipping these spares in a pocket or bag is pretty simple. Good luck to you.