MegaBat800 Game Boy Advance SP High Capacity Battery

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MegaBat800 Game Boy Advance SP High Capacity Battery

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 3d printed shim with the battery but you can also print your own using the file below.


5 Reviews

  • 5
    Highly Recommend

    Posted by Sal C. on Jul 14th 2021

    This was my first order form this site and I received it within 3 days! This battery is great. I had been looking for an SP battery for a while and a friend recommended this one. Once fully charged it lasts quite a while - actually feels like it lasts a little longer than I remember the original battery lasting.

  • 5
    MegaBat800 for gba great product and great quality and great value.

    Posted by Alfred L on Jul 12th 2021

    Finally, a great replacement battery for my GBA SP. Outlast my old battery by 4 hours. Great job.

  • 5
    Works great

    Posted by Tim on Jun 14th 2021

    Easy to install, included shim made for a perfect fit in my AGS-101, charging and holding great.

  • 5
    Works as advertised, with warning

    Posted by Frank P. on Jun 13th 2021

    Just put in and charge... got well over 8 hours on the first charge with heavy play. Next few charges have been crazy long.

    One thing: it didn't work when I used the included shim (wtf?). Took out the shim and it worked fine. So, beware a tight fit isn't always the best (giggity).

  • 5
    SP High Capacity Battery

    Posted by Brandon on May 22nd 2021

    After buying multiple products with SAG, this is no exception to the company's great products. Great and easy way to add more hours to your SP's battery life!