EZOPower High Capacity Extended Replacement Battery (4200mAh) + White Door for Samsung Galaxy S3 SIII i9300 (AT&T i747, T-Mobile, Sprint, Verizon) Android Phone EZOPower High Capacity Extended Replacement Battery (4200mAh) + White Door for Samsung Galaxy S3 SIII i9300 (AT&T i747, T-Mobile, Sprint, Verizon) Android Phone

Pros: Its a '4200 mAh Battery' (but it doesn't behave like one)
Does last longer than the 'stock battery' that came with my Galaxy S3 and if you hardly use your phone, you can easily get a day and a half out of it but 2 days? I think not.
Great price

Cons: Huge but that was expected. Larger capacity batteries are generally bigger in size.
No NFC on this battery but I knew that before hand too.

Other Thoughts: I have had this battery for 2 weeks now and I am yet to be really impressed. I am not marking this battery too hard as I have read several reviews of other '4200,' '4400' and even '3500' mAh batteries before making this purchase and based on price, its a good buy but I am disappointed in the performance. I see where one guy said that he got '3 days' out of this battery, I don't know what that guy does on his Galaxy S3 but I use the internet fairly often and game occasionally and I am yet to get two days worth of power. I am looking for a battery that can give me a least 2 days & a few hours before it needs to be recharged. I was hoping that EZO would have been the answer but obviously its not. My search continues; I will try to get by hands on a SEIDIO 3500mAh and maybe a Hyperion 4200 mAh... and who knows, if I feel crazy enough, I might buy the ugly yet potent ZeroLemon 7000mAh monster of a battery. I will do my test on these units & whenever I strike 'gold,' I will be sure to share my findings with you all. Finally, the photo displays how poorly this battery performs for its capacity, I had it fully charged while my phone was off, turn on my at 12:20am Saturday March 29, used the phone as a hotspot for 3hours and then did some light browsing with Google plus and Dolphin Browser and at 11:50am just 10minutes before noon, my power is down to 41%... NOT IMPRESSED! Try another brand. I would go for SEIDIO, the cells used to make their batteries seem to come from good source.

Pros: After fully charging the battery it would last me for 3days!

This thing is absolutely amazing, and the extra thickness allows for perfect grip on the phone. The weight is not increased by much and makes the S3 feel solid and great.

Cons: The blue back cover looks too dark compared to the blue that my S3 has.

Other Thoughts: Overall great battery, S3 wont detect it perfectly so it may seem like you loose charge all of the sudden like 10-20%, but it actually does last a long time. The phone just cant read the battery good enough. Not battery defect, just phone.

Pros: Already left a review about the product, and loved it.

Just wanted to add...

Due to my own foolishness, I cracked the back cover that came with the battery.

I contacted EZOPower, and made no effort to hide the fact that it was my own fault that it cracked.

I asked if it was possible to purchase the cover by itself, as I did not need a second battery.

Instead of selling me one, they told me they would send me one, free of charge.

It took a while, but I just recieved the shipment, and much to my surprise, they sent me the entire kit, battery and all.

Nice to know of a manufacturer that stands by their product, even when your own carelessness causes it to break.

Cons: none

Other Thoughts: I forgot to mention in my previous review...

S-Beam, and NFC do not work with this battery.

No one I know actually uses those features though, so not a big deal.

But should be mentioned.

Pros: VERY LONG LASTING!!!

I received, and charged the battery on Friday.

Went on a 24 hour there and back road trip for the weekend. and was playing on the phone nonstop the entire way there and back. Sunday night the battery was at 15%!

This can be a Con...

However i see this a pro! it adds weight and thickness to the phone and to me it feels better in the hands.

I would recommend this to anyone who is constantly worrying about running out of juice during the day.

Cons: None besides the fact that i cant find a case that would work with the battery pack :P

Other Thoughts: Does anyone know of a case that will fit with the extended battery?

Pros: This batter lasts for EVER!

Unplugged at 7am on Tuesday with a full charge.

Used very heavily untill the battery got down to 5% on Thursday at 2am.
(Nearly 48 Hours Of Heavy Use!!!)

Back plate seems to be pretty sturdy too, maybe a stronger plastic than oem.


Its usually hit or miss with aftermarket batteries.

(Double capacity but somehow lasts about the same as oem)

That is clearly not the case with this one.

Usage time on battery has definitely been dramatically/rediculously improved.

Cons: -1 Egg for imperfections on the back cover.

A few dimples here and there.

Slightly deformed around the headphone jack.

Neither is very noticable, but they are defects.

Other Thoughts: It should go without saying, but just in case...

Your phone will not fit in any fitted docks, and no standard covers will fit, as this kit pretty much doubles the thickness of the phone.