SHENMZ GBA Sp Battery, Upgraded (2800mAh) Ultra High Capacity Rechargeable Lithium-ion Battery for Nintendo GBA SP Gameboy Advance SP AGS-001 with Screwdriver

If you own an sp since it came out, want to buy one, or recently bought one second hand, this is a great upgrade for your SP. Especially if you've upgraded to a better quality screen like I've done. The battery life am testing right now after I drained it and fully charged it. I do know is that it stopped charging once the battery became fully charged. The battery itself is similar in dimension to the original battery.

Perfect

An absolute must have. Especially with the new screens that go really vivid and bright.

Super easy installation and my gameboy lasts pretty much all day. About 10 hrs before power goes red.

After installing this battery and using it multiple times, it only lasted 45 minutes before it would turn off. Installing the battery was easy enough as I just needed to take off the back panel and replace the old battery, however with how fast the battery drains when using my Gameboy Advanced SP, my device will be on the charge more often than its being used.

Repair shops will charge you $50-$100 when you can spend less than $10 and fix it yourself

Quality is awesome! Charging ability is awesome! Battery life is awesome! The color is as described and it wasn't hard whatsoever to install. The feel is good quality and the fit was spot on!

Battery lasts a long time