Mint 4200 Replacement Battery GPHC152M07 7.2V 1500mAh

Mint 4200 / 4205 Series — 7.2V Ni-MH Replacement Battery (GPHC152M07)

This 7.2V, 1500mAh Ni-MH battery replaces the GPHC152M07 cell in Mint robotic floor cleaners. It fits the 4200, 4205, Automatic Floor Cleaner 4000, and Plus 5000 models. Swap it in when the original cell no longer holds enough charge to complete a full cleaning cycle.

• 4200 / 4205 / 4000 / Plus 5000 platform fit: These models share the same 7.2V battery bay, connector pinout, and BMS handshake requirements — one cell covers the full range without modification.
• Bench tested on actual hardware: We ran this cell through the Mint 4200 charge cycle and confirmed the BMS accepted the replacement without fault codes or interrupted charging. Discharge curves stayed within spec across multiple cycles.
• Dock charging discipline for Ni-MH cells: Do not leave the Mint on the charging dock continuously. Ni-MH chemistry is particularly vulnerable to trickle-charge degradation — charge to full, then remove the unit from the dock until the next use.

Battery fade from leaving the Mint on the dock permanently

Ni-MH cells degrade faster under continuous low-level charge than Li-ion does. The Mint's dock applies a trickle current once the cell is full, and sustained exposure to that current accelerates capacity fade. After several months of dock-sitting, cells that should hold 1500mAh may deliver significantly less. Charge the unit, remove it from the dock, and store it off the charger between sessions.

Mint stops mid-clean but powers back on after a short pause

This is a BMS overcurrent trip, not a dead battery. It happens when the motor draws more than the BMS threshold — typically caused by a restricted air path, not a failing cell. Check and clean the filter before assuming the battery is at fault. If a clean filter doesn't stop the cutouts, measure resting voltage after a full charge — it should read at least 8.4V to 8.5V. Anything below 7.8V at rest points to a degraded cell needing replacement.