Ecoh M-288 Cordless Vacuum Compatible Battery 14.4V 4000mAh

Ecoh M-288 — 14.4V Ni-MH Replacement Battery

This is a 14.4V, 4000mAh Ni-MH replacement battery for the Ecoh M-288 cordless vacuum cleaner. It fits directly into the M-288 handheld unit and restores suction power to a vacuum whose original cell has degraded. Capacity is rated at 57.6Wh and chemistry is Ni-MH, matching the original specification.

• M-288 platform fit: The M-288 runs a 14.4V Ni-MH cell with a fixed connector orientation and BMS voltage threshold tuned to that chemistry. Swapping to a matched Ni-MH cell at the same voltage keeps the motor controller and charge circuit operating within their expected range.
• Bench tested on actual hardware: We cycled this cell through repeated load draws simulating carpet and hard-floor suction modes. The BMS held cutoff at the correct low-voltage threshold and recovered cleanly on charge without false trips.
• Dock charging behaviour on the M-288: Do not leave the M-288 sitting on the charging dock indefinitely between uses. Continuous trickle charge accelerates capacity fade in Ni-MH cells faster than in lithium chemistries. Charge to full, then remove from the dock.

Suction dropping before the battery indicator reaches low

Ni-MH cells show a steeper voltage sag curve under load than the indicator LED is calibrated to track. When the motor draws higher current — through thick carpet or a partially blocked filter — terminal voltage drops faster than the indicator responds. The vacuum loses usable suction while the indicator still reads mid-charge. Clean the filter first; if sag persists, the cell's internal resistance has risen and replacement is the correct fix.

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

This is a BMS overcurrent trip, not a mechanical fault. Restricted airflow — usually a blocked filter or full dust cup — forces the motor to draw sustained current above the BMS threshold. The BMS cuts power to protect the cell, then resets once current demand drops. Clear the filter and empty the dust cup; if the cutout continues on an unobstructed unit, check that terminal voltage under load stays above 12V.