Finnpipette Novus Single 3.7V 950mAh Replacement Battery

Finnpipette Novus Single — 3.7V Li-ion Replacement Battery (12905550)

This 3.7V, 950mAh Li-ion cell replaces part number 12905550 in the Finnpipette Novus Single and Multichannel electronic pipettes. It restores power to the motorized pipetting mechanism that drives precise liquid aspiration and dispensing. Confirm your unit's OEM part number on the battery label before fitting.

• Novus Single and Multichannel compatibility: Both variants share the same 3.7V cell footprint, connector pinout, and BMS handshake protocol — the 12905550 part number covers the full Novus range rather than a single-channel variant only.
• Bench tested on actual hardware: We cycled this cell through charge and load under the Novus pipette's motor-drive profile. The BMS accepted the cell, completed its verification sequence, and maintained stable output through aspiration and dispensing cycles without triggering a low-voltage cutoff.
• Post-installation self-test protocol: After fitting this cell, allow the Novus to complete its full power-on self-test without interrupting or restarting the device — the BMS runs a chemistry verification at startup, and cutting power mid-sequence logs a persistent battery fault that survives until the next complete reboot.

Why the Novus pipette won't complete its boot sequence on a new battery

The Novus firmware runs a BMS learn cycle during the first few charge-discharge passes on a new cell. Until that cycle completes, the charge IC applies a conservative current limit and the device may stall mid-boot with a battery warning. This is not a faulty cell — it is the BMS calibrating against the new chemistry. Run one full charge to completion and one full discharge through normal pipetting use, then recharge. By the second cycle, the boot sequence completes normally and the battery indicator reads accurately.

Charge indicator stuck below 100% on first charge

On a first charge, the Novus charge IC caps input current while it profiles the new cell — the indicator can sit at 85–95% for an extended period before the final top-up phase begins. Removing the pipette from the cradle before that phase completes leaves the cell at roughly 3.9–4.0V instead of the full 4.2V threshold. Leave the unit in the charging cradle until the indicator confirms a complete charge, then proceed with normal use. Subsequent charges resolve faster once the IC has a full cell profile recorded.