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MegaBat800 High Capacity Battery for Game Boy Advance SP

$11.99
(30 reviews) Write a Review
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SKU:
SAG0033630[AA-4L]
MegaBat800 High Capacity Battery for Game Boy Advance SP

Custom made battery for the Game Boy Advance SP with a true and tested capacity of 800mAh for extra hours of play time in comparison to the old and failing OEM batteries and the many clones with less than 600mAh that they claim.

 

The battery does not have the 2 plastic teeth that the stock battery has but this is not an issue at all with the battery as it fits snugly in the battery compartment and the pressure of the spring contacts and the cover help it stay in place just fine with the AGS-001 GBA SP. The AGS-101 SP and After Market Shells might need a shim to make better contact, we will include a shim with the battery but you can also 3Dprint your own using the file below.

 

https://www.mediafire.com/file/zu2pkz83id9uidc/GBA+SP+Battery+Shim+v2.stl/file

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30 Reviews

  • 5
    Best GBA Battery I've used

    Posted by Lindsey C. on Oct 3rd 2025

    I bought this back in July, but I'm only now getting around to reviewing it. In that time, I don't think I've had to charge my GBA once. Granted, I'm not using it on the daily or anything, but my old GBA battery would go red annoyingly often. I did have to use the provided 3D printed teeth to fit it into my GBA SP, but it fits snugly and hasn't given me any issues.

  • 5
    Battery replacement

    Posted by Jarrod Rainwater on Jul 23rd 2025

    Super easy to pop in and works perfectly. Will be buying more from this company in the future

  • 5
    Megabat800

    Posted by Justin P on May 8th 2025

    Great investment for GBA SP, my original battery had only couple hours charge at a time before I replaced it with the Megabat800 battery what a night and day difference between them now I am getting 8 to 10 hours of charge off one charging

  • 5
    Great, when I got it

    Posted by Nugie on Dec 29th 2024

    it was of no fault of Stone Age Gamer, I just chose a horrible time to order as the very next day Canada Post went on its MONTH LONG STRIKE-

    that being said, it was well worth the wait, I`m easily able to get 4 hours out of a full charge with an IPS-modded GBA SP AGS-001. don`t trust the ``800``, ``1000`` or ``1600``mAh things you`ll find on Amazon, get this instead

  • 5
    The best GBA Rechargeable battery

    Posted by Russ Crowley on Nov 25th 2024

    I had a screen upgrade done on my GBA SP. The stock battery, and other ones I've tried did not hold a charge for more than 30 minutes due to the extra energy needed to power the new screen. This battery was the only one I've tried that hold a charge for the majority of the time that it's suppose to.

  • 5
    Fits perfectly and holds a long charge!

    Posted by Bry C on Mar 16th 2024

    The battery works amazing, gave it a quick charge and it saved my gameboy sp. they even included a small 3D-printed bumper so the battery stayed in place, as it is a tiny bit smaller than the original.

  • 5
    Megabat 800: easy install, spacer will be used for ags 001

    Posted by Wesley R. on Mar 16th 2024

    This is a great product, shipped in 3 days, easy 10 second install. Battery life outstanding for the ags 001. Playing ffv with brightness on. I`ve played 3 hours which is where my 20 year old stock battery needed charging and I don`t even have a red light yet.

  • 5
    MegaBat800 Makes a Big Difference for a Small Price

    Posted by Mitch S on Dec 30th 2023

    Highly Recommend. Tack it onto your next order from Stone Age Gamer because the cost for the value you get is phenomenal. Super easy to replace the battery and works perfectly in my GBA SP 001 and 101. My old OEM battery was lucky to last an hour after years and years of use. I tried a generic replacement and it was honestly no better at all. Picked up the MegaBat800 and all of a sudden I'm playing for hours on the green light, it's just not a concern anymore. No reason not to. It's great and does what it advertises.

  • 5
    Very Long Life

    Posted by Lucas Stonehouse on Dec 20th 2023

    The ``850V`` battery I bought off amazon for the same price provided less than two hours of life with my IPS screen. This amazing battery provides over 5 hours.