Cleanfriend M488 14.4V Replacement Battery 3000mAh Ni-MH

Cleanfriend M488 — 14.4V Ni-MH Replacement Battery

This is a 14.4V, 3000mAh Ni-MH replacement battery for the Cleanfriend M488 cordless vacuum. It fits directly into the M488 handheld and stick vacuum body. When the original cell degrades and the vacuum loses power mid-clean, this is the replacement unit.

• M488 fitment: The M488 runs a 14.4V Ni-MH pack with a fixed connector orientation and BMS that expects the voltage curve of a Ni-MH cell — not Li-ion. Swapping chemistry types will cause the charger to misread state-of-charge and undercharge or refuse to charge the pack entirely.
• Bench tested on actual hardware: We cycled this pack through full charge and discharge passes and confirmed the BMS holds the correct charge termination signal at peak voltage detection — the standard delta-V cutoff Ni-MH chargers rely on. The cell held steady output across sustained motor load without premature cutoff.
• Dock charging behaviour on the M488: Do not leave the M488 on the charging dock continuously. Ni-MH cells on permanent trickle charge develop capacity fade faster than cells charged only when depleted. Charge to full, then remove the vacuum from the dock between uses.

Cordless vacuum losing suction before the battery indicator reaches low

This happens when the motor draws more current than the cell can sustain under load — not because the battery is empty, but because voltage is sagging under demand. On the M488, a partially blocked filter forces the motor to work harder, pulling more amps and causing the pack voltage to drop below what the motor controller needs. The vacuum reads this as low battery even when charge remains. Clear the filter first, then test again — if suction returns to normal, the battery is not the root cause.

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

This is a BMS overcurrent trip, not a failed battery. When suction is restricted — by a blockage, a clogged filter, or a sealed floor attachment — the motor draws a sustained burst of current above the BMS threshold, and the pack shuts output temporarily to protect the cells. The recovery pause is the BMS resetting. Remove the blockage or clean the filter, then restart the vacuum. If trips continue on an unobstructed machine, check that pack voltage at rest is above 12.5V with a multimeter.