Midea H3 Cordless Vacuum Replacement Battery 7.4V 2500mAh

Midea H3 — 7.4V Li-ion Replacement Battery (INR18650-25R)

This is a 7.4V, 2500mAh Li-ion replacement battery for the Midea H3 cordless handheld vacuum cleaner. It matches the OEM part number INR18650-25R and fits directly into the H3's battery compartment. Order this when the original cell no longer holds charge or the vacuum loses suction well before the indicator shows low.

• H3 platform fit: The H3 uses a compact 7.4V two-cell Li-ion pack at this exact form factor. The BMS on this replacement matches the voltage rails and discharge curve the H3 motor controller expects — no modification needed.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on the H3 motor circuit. The BMS held cutoff cleanly at low-cell voltage and did not trip during the motor's start-up current draw.
• Dock charging on the H3: Remove the H3 from its charging dock once the battery reaches full. Cordless vacuums left continuously docked receive a low-level trickle charge that accelerates capacity fade — this shortens the usable life of the new cell faster than regular cycling does.

Suction dropping on the H3 before the battery indicator reaches low

This is a voltage sag symptom, not always a dead battery. When the H3 motor draws current under load — particularly on carpet or through a partially blocked filter — cell voltage dips below what the motor controller expects. The controller responds by reducing power output, which reads as suction loss. A degraded original cell sags far earlier in its discharge curve than a fresh pack. Replacing the cell restores the flat voltage curve the H3 needs to hold consistent suction through a full clean.

H3 motor cuts out mid-use then recovers after a few seconds

This is a BMS overcurrent trip, not a faulty motor. When airflow is restricted — by a clogged filter or a blockage in the nozzle — the motor works harder and pulls more current than the BMS allows. The BMS shuts the circuit to protect the cell, then resets after a short cooldown. Clear the filter and check the nozzle path first. If the cut-out stops after cleaning the filter, the battery was not the cause — but if it continues with an unobstructed path on a new cell, check that cell voltage under load sits above 6.0V.