Logitech diNovo Edge Compatible Battery 3.7V 950mAh Li-ion

Logitech diNovo Edge / DiNovo Mini — 3.7V Li-ion Replacement Battery (190304-2004)

This 3.7V, 950mAh Li-ion cell replaces the internal rechargeable battery in the Logitech diNovo Edge, DiNovo Mini, and Y-RAY81 wireless keyboard units. Over time the original cell loses charge capacity, causing shorter active periods between docking or charging. Swapping this battery restores the unit to factory charge behaviour without replacing the entire keyboard.

• diNovo Edge, DiNovo Mini, and Y-RAY81 compatibility: All three models share the same 3.7V single-cell architecture, identical connector pinout, and the same BMS charge profile. One cell fits all three without modification.
• Bench tested on actual hardware: We ran this cell through full charge cycles on a diNovo Edge dock. The BMS accepted the charge handshake immediately and held a stable 4.18V at full charge with no overcharge flag triggered.
• Dock charging after a full battery swap: If the diNovo Edge has been without power long enough to fully drain, seat it in the charging cradle for at least 2 hours before attempting to power it on. A deeply discharged cell may need a trickle phase before the keyboard's microcontroller registers enough voltage to boot.

Why the diNovo Edge loses Bluetooth pairing after the battery goes flat

The diNovo Edge stores its pairing data in volatile memory backed by the battery. When the cell fully discharges, that memory loses power and the pairing record is wiped. After fitting a new battery, the keyboard appears as an unpaired device to the host PC. To restore the connection, hold the Connect button on the underside of the keyboard until the status light flashes, then re-pair through your OS Bluetooth settings. This is a firmware behaviour — not a fault with the replacement cell.

diNovo Edge powers on but keyboard input cuts out intermittently

Intermittent dropout during typing usually points to a cell that has aged below the minimum operating voltage under load, even if the indicator light still shows partial charge. An old Li-ion cell can read 3.5V at rest but sag below 3.2V the moment current is drawn, which trips the low-voltage cutoff mid-use. Fit the new cell and let the dock charge it to a full 4.18V before use. If dropout persists after a full charge cycle, check that the battery connector is fully seated — a half-engaged connector causes the same sag symptom.