Amazon.com: Replacement Battery Part No.LC18650 for NVIDIA P2570, Shield, Remote Control Battery : Electronics
Replace battery on the 2017 shield controller : r/ShieldAndroidTV
Amazon.com: Replacement Battery for Nvidia Shield Game Controller,Shield TV Game Controller,P2920,fits HFR-50AAJY1900x2(B),HRLR15/51,1800mAh/4.32Wh : Video Games
Battery Replacement for Shield Game Controller P2920, Shield TV Game Controller HFR-50AAJY1900x2(B), HRLR15/51, 2.4V/1800mAh : Video Games - Amazon.com
Battery for Shield Game Controller : r/nvidiashield