Modded Nintendo DSi (Japanese) needs battery replacement

The original battery has some slight swelling and needs to be replaced before charging. For safety reasons, the battery will not be included but the device still works well. Has CFW installed in a 32gb sd card Has some scratches on the shell and screens. There’s also some visible yellowing on both screen. Comes with original stylus, 3rd-party wall charger, and a clear protective case.