Logitech G703 Lightspeed Weight Reduction and Battery Mod 75grams | Beardedbob
950MAH Original size battery for Logitech wireless mouse G403 G900 G903 G703 battery Logitech x100 Li Polym batteries|Mobile Phone Batteries| - AliExpress
Logitech A-00031 G Pro Wireless G304 G502 Keyboard Replacement Battery: BatteryClerk.com
Bought a double clicking G703 for cheap. Swapped in a lighter battery, GM switches, and fixed scroll wheel. Pretty in love with it now. : r/MouseReview