Hoover Rhapsody 21.6V Replacement Battery 2500mAh

Hoover Rhapsody Series — 21.6V Li-ion Replacement Battery (RABATT22VLI)

This is a 21.6V, 2500mAh lithium-ion battery that replaces the original pack in the Hoover Rhapsody cordless vacuum. It fits the RA22AFG 011, RA22ALG 011, RA22PTG 011, and over 20 additional Rhapsody variants. The connector and BMS communication match the original Hoover pack exactly.

• Rhapsody platform fit: All listed RA22 variants share the same 21.6V battery rail, connector pinout, and BMS handshake protocol. One battery covers the full range without modification.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on a Rhapsody unit. The BMS held the 21.6V nominal rail cleanly, overcurrent protection tripped correctly under simulated blockage, and the charger recognised the pack without fault codes.
• Dock charging behaviour on the Rhapsody: Do not leave the vacuum on the charging dock continuously. The Rhapsody dock delivers a trickle charge once the pack is full — prolonged dock sitting degrades cell capacity faster than normal cycling. Charge to full, then remove it.

Suction dropping before the battery indicator reaches low

This happens when the motor draws more current than rated — usually caused by a partially blocked filter or a developing blockage in the brush head. The BMS reads the voltage sag from the extra draw and throttles output to protect the cells before the fuel gauge triggers. The vacuum feels like it's running out of charge when the battery is still above 50%. Clean or replace the filter first, then check the battery — if suction restores immediately after a filter clean, the battery is not the issue.

Motor cuts out mid-clean then recovers after a few seconds

This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked filter, tangled brush roll, or a carpet pile that stalls airflow — the motor load spikes above the BMS threshold and the pack shuts off momentarily. The BMS resets automatically once the overcurrent clears, which is why the vacuum restarts on its own. Clear the blockage and confirm the filter is clean; if the cutout continues on an unblocked machine, check that the pack voltage sits at or above 19V on a multimeter after a full charge.