Cameron Sino Battery for Ninten MWH710A01 New 3DS NN3DS Ninten KTR-003 1200mAh 4.44Wh

So this one, perhaps? https://www.amazon.com/Cameron-Sino-Battery-MWH710A01-KTR-003/dp/B0H38HFKY6/ref=sr_1_1_sspa