Elfbot T2 14.8V Cordless Vacuum Replacement Battery 2600mAh

Elfbot T2 / C1 / D1 / M160 — 14.8V Li-ion Replacement Battery (FD-CDM-A-L14.4)

This is a 14.8V, 2600mAh Li-ion battery pack for the Elfbot T2, C1, D1, and M160 cordless stick vacuums. It replaces OEM part FD-CDM-A-L14.4 and restores power to the vacuum's motor and suction system. Capacity matches the original spec at 38.48Wh.

• T2, C1, D1, and M160 compatibility: These four Elfbot models share the same 14.8V battery rail, connector pinout, and BMS handshake protocol — one pack serves all four without modification.
• Bench tested on actual hardware: We cycled this pack through motor-start loads on the T2 platform. The BMS held steady through repeated start surges and responded correctly to the charger's handshake signal without throwing a fault.
• Dock charging behaviour: Do not leave the vacuum sitting on the charging dock between uses. Continuous dock connection exposes the cells to a slow trickle charge that accelerates capacity fade. Charge to full, then remove the vacuum from the dock until the next use.

Suction dropping before the battery indicator reaches low

The T2's motor draws more current the moment airflow is restricted — a partially blocked filter or full dustbin forces the motor to work harder at the same voltage. As current draw climbs, cell voltage sags earlier in the discharge curve than the indicator expects, so suction weakens while the LED still shows two or three bars. This is not a battery fault — it's a load mismatch caused by restriction. Clean the filter and empty the dustbin before concluding the battery is weak.

Motor cutting out mid-clean and recovering after a few seconds

This is a BMS overcurrent trip. When the vacuum sustains restricted suction for more than a few seconds — hair wrap on the brush roll, blocked inlet, or clogged filter — current draw spikes past the BMS protection threshold and the pack shuts off to protect the cells. The BMS resets automatically after a short thermal and voltage recovery window, which is why power returns after a pause. Clear the blockage and restart the vacuum; the trip will not repeat if airflow is restored. If it trips repeatedly on an unblocked machine, check the brush roll for debris wrapped at the bearing ends.