Got tired of replacing AAA batteries for a crappy bluetooth mouse. Replaced everything with a LiPo battery. It charges like an Apple Mouse now, but works like a charm. : r/techsupportmacgyver
ZNTER S17 1.5V 400mAh USB Rechargeable AAA Lipo Battery Sale - Banggood UK Mobile-arrival notice
LiPo battery for Locator Beacons & Servo/Solenoid/Pager Timers – BMK's Free Flight Store
Amazon.com: Rechargeable Lithium AAA Batteries 4Packs, 1100 mWh Rechargeable AAA Battery Constant Output 1.5V Li-ion AAA Battery, 2H Fast Charge with USB Cable, 1000 Cycles Life-span for Toy Cars Toothbrush : Health
DF95 - 950mAh AAA 6v battery pack - HUMP
AAA 1.5V 740 mah USB Rechargeable AAA Lipo Battery li-polymer lithium li-ion battery aaa 1.5V battery - AliExpress
2 x AAA 1.5V 750mAh USB Rechargeable LIPO Battery Lithium Batteries USB Charging | eBay
Brickstuff 1 x AAA Battery Mini Power Source - SEED15
2 x AAA 1.5V 750mAh USB Rechargeable LIPO Battery Lithium Batteries USB Charging | eBay
2x AAA Battery Box with Switch and JST Connector – Kitronik Ltd