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Hyperion Samsung Galaxy SIII 4200mAh Extended Battery Review



When I bought my new Samsung Galaxy S III I loved it except for one thing. I couldn’t get through the day with a single charge of the battery despite tweaking that delivered some improvements.

That’s why I ordered the Hyperion Samsung Galaxy SIII 4200mAh Extended Battery. Now I can go more than a full day on a single charge even with heavy usage.

The Hyperion Samsung Galaxy SIII 4200mAh Extended Battery fits my AT&T version of the phone perfectly. I read some reviews on Amazon that said user had to force the battery cover in place, but I didn’t experience that. The battery fit perfectly and the back case snapped on without a hitch.

hyperion battery for galasy s iii

With the battery installed the Galaxy S III doubles in thickness and weighs the user down a little more than the stock battery. Fortunately, the S III weighs very little for such a large phone and it’s not very thick at all. Adding a few millimeters to get more than a day out of the battery is a worthwhile trade-off.

hyperion battery for galaxy s iii

The battery comes with a custom plastic back that covers the phone with the larger battery installed. It feels smooth to the touch and fits perfectly. Unfortunately, mine cracked just above the charger connection. I didn’t drop the phone or push on it with any force. I can barely see it and wouldn’t have noticed except that I examined the case for this review. I contacted Hyperion through Amazon and they promised to send a replacement backing.

hyperion battery backing

I bought my battery from Amazon for just $19.95. It should work with every version of the phone from the various carriers. I’m concerned about the back cover’s quality, but if Hyperion makes good and replaces any broken covers, that shouldn’t cause a problem. At this point, early in the life of the battery, I’d call this a good buy for anyone wanting longer battery life for their Samsung Galaxy S III.

If you choose to take a chance on the battery, be sure to follow the instructions which say to charge the battery to 100 percent the first time. I’d wait and install it at night before going to bed. Then use it till the phone shuts down. This should get the user through one full day and most of the next day. Mine lasted from about 8 AM till nearly 6 PM the next day. I then plugged in the stock battery to get me through the rest of the day. I charged at night and now I get most of two days. Hyperion says not following the directions will keep the battery from lasting as long.



  1. Wally

    08/27/2012 at 1:21 pm

    I had the same problem. I searched and found a 4500 mah battery from Gorilla Gadgets. I am on my second day of heavy use w/Pandora as well. My only complaint is that the back cover didn’t have the Verizon or Galaxy Slll logo on it. I went to a local graphics design place and they hooked me up. Now you can’t tell the OEM from the standard except for the hump.

  2. Dave Madel (@ghostobzen)

    08/29/2012 at 10:51 am

    You should review Mugen’s 4600mah battery as well [HLI-I9300XL]

  3. paolo

    09/12/2012 at 3:02 am

    Hi, I see many complains in Internet about the real capability (mah) of these batteries. It looks that the company sells re-labelled products with lower specifications.

  4. jasonM

    09/17/2012 at 11:29 am

    Great job. You just performed a service to the public. I bought this battery for my SGSIII and I love it including the battery door. I have been buying Seidio for my other devices and this one is cheaper, performs just as well, and the battery door is much nicer.

  5. iceroadman

    09/21/2012 at 2:23 pm

    My Galaxy 19300 goes for at least from 5 am to 9 pm without having to charge it on the stock battery, what gives with all the rest of your Galaxy s3’s.

    • Jewbacca

      10/19/2012 at 3:16 am

      Unlike you we use our phones heavily. You would not understand if you are not a tech savvy person.

  6. Mugen Power (@MugenBatteries)

    10/22/2012 at 1:40 am

    Looking forward to see the review of our 4600mAh battery from Kevin!

  7. Joseph

    11/19/2012 at 12:28 am

    Just got mine today, installed it and says i have 50% battery should i drain first then charge? Or charge now for 12hours.

    • LD

      11/19/2012 at 7:32 pm

      Charge for 12 hours and then drain to 5%. Then charge again for 12 hours. Repeat about 4 times and battery is good to go. I also had the same cracked back cover above the charge port(barely visible). Contacted Hyperion via Amazon and waiting for an answer. Battery lasts for 1 day 10 hours. Worth it!

      • tacio

        11/22/2012 at 9:10 am

        Hey LD, should we do this process for stock batteries also? i’m trying to extend it for a full day but only have 14 hours or so… on the first charge i didn’t do it, i might be on the 5th charge or so

  8. Ryan

    11/23/2012 at 10:03 pm

    Thanks for the review. Loved this companys product with my Evo Shift. Looking forward to getting my new S3 battery!

  9. Jennifer

    02/13/2013 at 6:32 pm

    I got my ectended battery from Amazon. It is the hyperion extented battery and has the NFC!

  10. bigjacksauto

    02/15/2013 at 5:21 pm

    does anyone make a case to fit over the bigger battery and cover?

  11. Ryan

    02/19/2013 at 10:04 pm

    i am wondering that too… i used an otterbox…. it is needed for my job

  12. Joe McGowan

    05/05/2013 at 9:19 pm

    I need my otterbox too, can anyone confirm it will still fit?

  13. jeffrey

    08/07/2013 at 5:46 pm

    is there a place in qatar where i can buy this battery?

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