COBBO PRO 27 Replacement Battery 14.4V 5200mAh Li-ion

COBBO PRO 27 / PRO 27+ — 14.4V Li-ion 5200mAh Replacement Battery

This is a 14.4V Li-ion battery rated at 5200mAh (74.88Wh) for the COBBO PRO 27 and PRO 27+ cordless stick vacuums. It replaces the original pack when capacity has faded and the vacuum no longer holds a useful charge. The cell dimensions are 136.60 × 37.60 × 37.30mm — verify these against your existing pack before ordering.

• PRO 27 and PRO 27+ compatibility: Both models run the same 14.4V battery rail with the same connector and BMS handshake. One pack covers both variants without modification.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on the PRO 27 platform. The BMS held communication with the charger correctly and did not trigger a fault cutoff under normal load draw from the motor.
• Dock charging behaviour on the PRO 27: Do not leave the vacuum sitting on the charging dock continuously. The PRO 27 dock does not cut power once the pack is full. Trickle current over days accelerates capacity fade. Charge to full, then remove the vacuum from the dock.

Suction dropping before the battery indicator reaches low

This happens when the motor is working harder than rated — usually because of a partially blocked filter or debris path. Higher motor draw pulls the cell voltage down faster than the indicator circuit expects, so the vacuum loses suction while the LED still shows a healthy charge level. The BMS reads actual terminal voltage, not state-of-charge percentage, and it will cut output current before the indicator LED trips. Clean the filter and check the nozzle path before assuming the battery is faulty.

Motor cuts out mid-clean then recovers after a short pause

This is a BMS overcurrent trip, not a dead battery. When sustained suction restriction forces the motor to draw above the BMS current threshold, the pack shuts off to protect the cells. After a brief rest the BMS resets and the vacuum powers back on. If this keeps happening on a new pack, the fault is mechanical — clear the filter, check the brush roll for hair wrap, and ensure the dust bin is not overfull. A clear airpath brings motor draw back within the BMS limit.