Logitech MX1000 Cordless Mouse Compatible Battery 3.7V 1800mAh

Logitech MX1000 Cordless Mouse — 3.7V Li-ion Replacement Battery (L-LB2)

This is a 3.7V, 1800mAh Li-ion replacement battery for the Logitech MX1000 cordless mouse (M-RAG97). It uses OEM part numbers L-LB2 and 190247-1000. When the original cell loses capacity and the mouse dies faster than expected, this is the direct swap.

• MX1000 and M-RAG97 fitment: Both the MX1000 and M-RAG97 share the same internal battery bay, connector pinout, and 3.7V charging circuit. One cell fits both without any wiring changes.
• Bench tested on actual hardware: We ran this cell through the MX1000 charging dock and confirmed the BMS accepted the charge cycle correctly, reaching cutoff without fault flags or interrupted charging.
• Charging dock compatibility tip: The MX1000 charges via its cradle, not a USB cable. If the cradle LED flashes orange and never turns green after fitting a new cell, seat the mouse firmly — the charging contacts on the underside need full surface contact to complete the circuit.

Why the MX1000 drains faster as the Li-ion cell ages

Li-ion cells lose active lithium with each charge cycle as the electrode material degrades. The MX1000's internal charging circuit has no recalibration routine — it charges to 4.2V and stops. Once the cell's usable capacity shrinks below a threshold, the mouse shuts off well before the voltage hits the cutoff floor. Swapping the cell restores the original capacity headroom the charging circuit expects.

Mouse pointer stuttering or jumping near end of charge

The MX1000's 2.4GHz transmitter draws brief current spikes each time it sends a position packet. When the cell voltage sags under load — typically below 3.4V on a degraded cell — the transmitter drops packets, which shows up as stuttering or skipping on screen. This is not a USB receiver fault. Recharging fully confirms whether the cell is the cause — if stuttering stops after a full charge but returns quickly, the cell has lost capacity and needs replacement.