subtel, Computer Battery, compatible with LG G7030; compatible with Logitech G703, G903 (1000mAh, 3.7V)

this battery is thicker than the original one, it still fits & works but is much harder to close the mouse, it might cause issues in the long term if the battery gets punctured due to fitting in with no extra space, but this is just speculation

Did not fit as intended, and did not work.