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Seidio Innocell Black 3500 mAh Extended Life Battery w/ NFC For Samsung Galaxy S3 BACY35SSGS3N-BK

  • Samsung Galaxy S3
  • Li-Ion
  • 3.8V
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Learn more about the Seidio BACY35SSGS3N-BK


Replacement Battery


Compatible Phone Manufacturer
Compatible Phone Model
Samsung Galaxy S3


3500 mAh


Comes with a black replacement door featuring Seidio's signature soft touch coating

Keeps your phone charged and ready to go, even with heavy phone and data usage

NFC: A very-short-range wireless connectivity that enables quick, secure two-way interactions among electronic devices. It is most often used as a credit card, debit card, transit pass, or any type of stored-value card for financial transactions.

Compatible with our Spring-Clip Holster, SURFACE Extended, SURFACE Extended Combo, ACTIVE Extended, ACTIVE Extended Combo

This product is not compatible with Seidio's SURFACE, ACTIVE, CONVERT, SURFACE Holster, ACTIVE Holster, or CONVERT Holster

Quick Info


  • Limited Warranty period (parts): 1 year
  • Limited Warranty period (labor): 1 year

Customer Reviews of the Seidio BACY35SSGS3N-BK

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  • Trang N.
  • 12/2/2013 10:43:52 PM
  • Tech Level: Average
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsGood for travel

Pros: I need this extended-life battery for my week-long bus trip. It lasted through a whole day of plenty of picture-taking & video-recording. From the moment I started using my phone in the morning (~6 a.m.) until the time I plug it back in to charge (~9 p.m.), I still had about 30% left every night.

Cons: The case provided with the battery makes the phone a little difficult to hold for small hands like mine. I cannot hold it with just one hand to take pictures. I also wish it came with a screen cover/flip cover like the SIII flip cover by Samsung.

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  • Bernaldi G.
  • 6/7/2013 9:07:56 AM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

5 out of 5 eggs3500mAh !!!

Pros: lasts 2 to 3 days with normal use :)

Cons: none

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  • Edward F.
  • 4/25/2013 9:59:48 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggs

Pros: Great fit and life span from battery. A real necessity for high usage

Cons: None

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  • Karen K.
  • 4/18/2013 5:11:14 AM
  • Tech Level: High
  • Ownership: 1 month to 1 year

4 out of 5 eggsGreat battery!

Pros: I purchased this directly from Seidio at full price (NewEgg didn't carry it at the time) for my wife.

Her last phone was always dead and I could never get up with her. She bought the SIII, and though the battery was larger it wouldn't last throughout the day. I installed the extended battery and now she can listen to internet radio over Bluetooth all day and have juice left over for games and phone calls.

If she only uses it for browsing the web, texting, social media, and phone calls she can get upwards to 3 days!

Cons: It makes the phone bigger and slightly heavier.
If you want a case you have to use theirs (no otterbox), and none of their cases that work with this battery have a built-in screen protector (as of this writing).

They do have a nice case\belt clip combo, but if you install your own screen protector the case pushes up against it and pulls it off the screen.

Other Thoughts: ***PLEASE READ***

To get the full capacity of the battery you MUST properly condition it.
1. Install and charge for 12 hours (I don't think this step is needed, but its on the box)
2. Drain battery until it is completely dead.
3. Charge for three hours after the light turns green.
4. Repeat steps 2-3 four more times. (five total)

It took us a solid 7 days to condition the battery because it took forever for it to discharge!

2 out of 2 people found this review helpful. Did you? Yes No

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