About this replacement
Midea Q5 / V5 Series — 25.2V Li-ion Replacement Battery (BP25220I)
This is a 25.2V Li-ion replacement battery for the Midea Q5 and V5 cordless stick vacuums. It carries OEM part number BP25220I and delivers 2000mAh (50.4Wh) of capacity. It fits the vacuum's battery bay and connects to the same BMS handshake the charger expects.
- Q5 and V5 platform fit: Both models run the same 25.2V six-cell Li-ion architecture and share the BP25220I battery format. The connector pinout, cell count, and BMS communication protocol are identical across the two, so one battery covers the full range.
- Bench tested on actual hardware: We ran this cell through the Midea charger cycle and monitored BMS handshake completion. The protection board responded correctly to charge termination and reported state-of-charge accurately to the vacuum's indicator LEDs.
- Dock charging on Midea stick vacuums: Do not leave the vacuum sitting on the charging dock permanently. Continuous dock charge on Li-ion cells in this class causes capacity fade significantly faster than cycling to depletion and then charging to full. Charge it, remove it from the dock, store it off the charger.
Suction dropping before the battery indicator reaches low on the Q5
The Q5 motor draws peak current under load — thick carpet, a partially blocked filter, or a near-full dustbin all spike that draw above the motor's steady-state rating. When the battery's internal resistance rises from cell age, voltage sags under that load even while the indicator still shows charge remaining. The BMS reads a momentary undervoltage event and throttles or cuts power to protect the cells. Clean the filter and empty the bin before assuming the battery is at fault — a restricted airpath is the most common trigger on this platform.
Motor cutting out and then recovering mid-clean
This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked filter, sealed nozzle against a surface, or a lodged obstruction — the motor pulls sustained current above the protection board's threshold. The BMS opens the discharge circuit, the motor stops, and after a few seconds the board resets and allows restart. Clear the blockage, check the filter is seated correctly, and restart. If it trips again immediately on a clean filter, measure resting voltage — a healthy cell at partial charge should read above 22V at rest.