This battery replacement is alright. After using my original battery for 2 years, I decided it's time to get a new battery since the former battery started to give out. This battery didn't quite fulfill my expectation. With my original battery, I was able to keep everything on the power control bar turned on (including auto brightness and wifi search), play games, keep the screen turned on, and it would still last for 8-9 hours straight under heavy usage. If I was went easy on my phone, the battery would last the whole day without having to recharge at all. This one doesn't last a lot more than my original one. I can't keep everything on my power control bar turned on and I can't keep my screen turned on for a prolonged period of time. Only then it will last like about 12 hours. I'm dubious about its "OEM" status. I don't think this battery is OEM, rather it's a cheap replica.