HUAENG Gameboy Advance SP Battery, Upgraded 1600mAh High Capacity Rechargeable Lithium-ion Battery for Nintendo GBA SP Gameboy Advance AGS-001, SAM-003

This battery was exactly what I needed to get my GBA SP back in the game, perfectly replacing the original. It's easy to install thanks to the included screwdriver, and this battery has a far greater capacity than the old original batteries did. I was also pleasantly surprised that it came fully charged. The price was also pretty far at under ten bucks. Five stars!

I don’t leave reviews often, but I’m very excited with this battery!I just recently did an SP Re-Shell and noticed my GBA SP battery was swollen. I watched a few YouTube videos and saw this one got pretty good marks so I picked it up.My swollen battery would stay green for 2 hours and then red for 45 minutes. While running the same test on this new battery, (playing Sonic Advanced sound Check with backlight on), I got 6 hours of green and 2 hours of red on my AGS-001.I’m now trying the “sleep” mode from another game and it’s been 18 hours and the light is still green. I’ll give an update once I finally get the full sleep mode duration.I should note that it did take multiple hours for it to charges; but with getting 3x the gameplay time from before, I’m happy to wait for it to charge longer.UPDATE:The sleep mode test was wild. I started at 8pm and the green light held till 3pm the next day. The red light held out until after midnight. That makes sleep mode 19 hours green and then the battery holding red until the 28th hour.

A quick minute or 2 of work for more battery life with a modern battery. Unscrew the cover, pull out the original battery, and plug in the new battery. Simple as that

Takes a while for it to charge. Longer than the original battery, but it also gets longer play time. This was suggested to me by someone I know who used it to replace theirs and my expectations were definitely beaten. This battery is worth the cash.

Laat a long time, but its hard to tell battery life. Red light starts flashing pretty early.

I'm happy with the battery life and it fits perfectly in the original phat DS. You could expect at least a few hours or so.

This is a great replacement for the OEM battery. Saw some other reviews saying you want to drain the battery before giving it a full charge. Did as recommended then fully charged it. Battery lasted 13 and 1/2 hours before dying with screen fully backlit. Original batteries last about 9. Definitely will buy more if needed!

Waste of money. Battery arrived dead, charged for 8 hours, still dead.