Tineco A11 Tango 21.6V Replacement Battery A11-07 2000mAh

Tineco A11 Tango / PWRHERO / A11 Hero Series — 21.6V Li-ion Replacement Battery (A11-07)

This is a 21.6V 2000mAh (43.2Wh) lithium-ion battery using OEM part number A11-07. It fits the Tineco A11 Tango, PWRHERO, A11 Hero EX, and A11 Hero cordless stick vacuums. The battery slides into the same locking bay as the factory unit and connects via the same five-pin BMS interface.

• A11 platform compatibility: The A11 Tango, PWRHERO, A11 Hero EX, and A11 Hero share the same 21.6V battery bay, connector pinout, and BMS handshake protocol. One battery form factor covers all four models because Tineco built this series on a common power platform.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the A11 platform. The BMS responded correctly to the charger handshake, held the full 21.6V nominal rail under motor load, and triggered thermal protection at the expected current threshold without nuisance trips.
• Dock charging behaviour on the A11 series: Do not leave the vacuum sitting on the charging dock permanently. The A11 series trickle-charges continuously when docked, which accelerates capacity fade in the cell. Charge to full, then remove the battery or vacuum from the dock.

Cordless vacuum losing suction before the battery indicator reaches low

This happens when the motor draws more current than the BMS expects — usually caused by a restricted filter, not a weak battery. The BMS reads an elevated current draw and reduces power delivery to stay within safe limits, which drops suction at the head. The battery indicator reflects state of charge, not available current, so it can still show two bars while suction is noticeably reduced. Clean or replace the filter first; if suction recovers, the cell was fine and the restriction was the cause.

Motor cuts out mid-clean, then recovers after a few seconds

This is a BMS overcurrent trip, not a dying battery. When the motor sustains a restricted airflow condition — blocked filter, clogged brush roll, or sealed nozzle — current spikes past the BMS trip threshold and the pack shuts output. The BMS resets after a short thermal and current cooldown, which is why power returns. Clear the blockage and check that the filter is seated correctly; if the cut-outs stop, the BMS is working as intended. If cut-outs continue on an unobstructed machine, measure resting pack voltage — it should sit at or above 22V after a full charge.