Inotec VC72 Ocean Sun 7.2V Replacement Battery 3000mAh Ni-MH

Inotec VC72 Ocean Sun — 7.2V Ni-MH Replacement Battery (30 27 003 / 30 28 003)

This is a 7.2V, 3000mAh Ni-MH replacement battery for the Inotec VC72 Ocean Sun cordless handheld vacuum cleaner. It fits the OEM part numbers 30 27 003 and 30 28 003. Capacity listed is from the product specification — 21.6Wh total energy.

• VC72 Ocean Sun platform fit: The VC72 Ocean Sun uses a 7.2V Ni-MH cell pack with a specific physical envelope — 127.20 x 45.00 x 23.70mm. Both OEM part numbers reference this same pack. The connector orientation and BMS contact points match the original dock charging circuit.
• Bench tested on actual hardware: We cycled this cell through discharge under simulated motor load. The BMS held stable across repeated draw spikes typical of a handheld vacuum picking up debris. Voltage held above the motor cutoff threshold through full depletion cycles.
• Dock charging discipline on the VC72: Do not leave the VC72 on its charging dock permanently. Ni-MH cells on continuous trickle charge develop capacity fade faster than cells charged only when depleted. Charge to full, then remove the vacuum from the dock.

Suction dropping before the battery indicator reaches low on the VC72 Ocean Sun

This happens because the vacuum motor draws more current when airflow is restricted — a partially blocked filter forces the motor to work harder, pulling amperage above its rated draw. The BMS reads this as a high-load event and throttles output voltage to protect the cell. The result feels like a dying battery, but the cell still has charge. Clean or replace the filter first — if suction recovers immediately, the battery was not the problem.

Motor cutting out mid-use and then recovering after a few seconds

This is a BMS overcurrent trip, not a dead battery. When sustained suction restriction forces the motor current above the BMS threshold, the protection circuit opens momentarily and then resets. The vacuum will restart after a short pause. Check the filter and the inlet path for blockages before assuming the battery is faulty. If the cut-out happens on a clear filter with a new battery, verify the charger fully brings the pack to 7.2V before each use.