AMICA Aura VM7050 21.6V Replacement Battery 2500mAh

AMICA Aura VM7050 — 21.6V Li-ion Replacement Battery (1191708)

This is a 21.6V, 2500mAh lithium-ion battery pack for the AMICA Aura VM7050 cordless vacuum cleaner. It replaces OEM part numbers 1191708 and BP21620H. Voltage and cell count match the original pack exactly so the existing charger and BMS handshake remain valid.

• VM7050 platform fit: The Aura VM7050 uses a 21.6V nominal cell stack with a proprietary connector and BMS communication line. This pack matches that voltage rail, connector pinout, and handshake protocol — the vacuum powers on and the charger recognises the pack without error codes.
• Bench tested on actual hardware: We ran the pack through charge and discharge cycles on a VM7050 unit, monitoring cell voltage balance and BMS cutoff thresholds. The protection circuit tripped correctly at undervoltage and recovered cleanly on reconnect to the charger.
• Dock charging habit on the VM7050: Do not leave the VM7050 sitting on the charging dock continuously between uses. Cordless vacuums on permanent dock charge develop capacity fade significantly faster than those charged only when the pack is depleted. Charge to full, then remove from the dock.

Suction dropping before the battery indicator reaches low

This happens when the motor draws more current than the BMS expects — typically caused by a partially blocked filter or a blockage in the suction path. Under that extra load, cell voltage sags early and the BMS throttles output to protect the pack, so suction weakens even though the indicator still shows charge remaining. It is not a battery fault. Clean or replace the filter first, then retest. If suction holds steady with a clean filter, the original pack had genuine cell degradation — this replacement pack will restore normal draw at rated voltage.

Motor cutting out mid-clean and then restarting after a few seconds

This is a BMS overcurrent trip, not a loose connection. When suction is restricted — blocked nozzle, saturated filter, or carpet fibres jamming the brush roll — the motor pulls sustained high current and the protection circuit cuts power to prevent cell damage. The BMS resets automatically after a short cool-down, which is why the vacuum restarts on its own. Clear the blockage, check the filter, and retry. If the cutout continues with no visible blockage, check that pack voltage reads at least 21.0V under load using a multimeter at the terminal contacts.