3.7V 2000mAh li Polymer Li ion Battery For MP3 MP4 DVR Toys Replacement Logitech G933 G533 Bluetooth headset 533 000132|Replacement Batteries| - AliExpress
Starnovo 3.7V 1800mAh Replacement Battery for Logitech G933 G533 Wireless Headset,Compatible Battery Part Number:LOGITECH 533-000132.