Li-Ion Rechargeable Battery Replacement for Game Boy Advance SP

I got this it works and the battery life seems as advertised but it was an extremely tight tight fit in my ags 101

The batteries are indeed long lasting but they barely fit inside the battery slot on a lot of my GBA SPs and require a very tight squeeze to fit inside.

Warning do not use this battery back on your original shell housing as it will literally crack your entire back piece in half of how tight the fitting is. Upon squeezing the pack in it just cracked in half, so disappointing losing my original shell..

Li-Ion Rechargeable Battery Replacement for Game Boy Advance SP

It's a battery. Not very complicated. It fits GBA SP. It recharges, it holds a charge. I don't know what else to say. If you're familiar with batteries, don't be surprised to find no surprises.

I purchased a battery for my GBA AGS-001 off amazon and it was predictably bad. 3 or so hours on a charge. So I returned it and bought one from Handheld Legend. This one gives me about 3 and 1/2 hours on a charge. It's disappointing, but I guess since Nintendo stopped selling OEM batteries, there's no way to get a decent GBA battery.