Bissell ICONpet 21.6V Replacement Battery 3000mAh Li-ion

Bissell ICONpet Cordless 2288 / ICONpet Pro 2746A — 21.6V Li-ion Replacement Battery (1621066)

This 21.6V 3000mAh (64.8Wh) lithium-ion battery fits the Bissell ICONpet Cordless 2288, ICONpet Cordless 22889, ICONpet Pro Cordless 2746, and ICONpet Pro Cordless 2746A cordless vacuum cleaners. It replaces OEM part numbers 1621066, 1618212, 1620773, 61-0088-026, and 61-0088-010. Capacity and voltage match the original cell exactly.

• ICONpet and ICONpet Pro compatibility: The 2288 and 2746 series share the same 21.6V battery rail, connector pinout, and BMS handshake protocol. A single cell services both lines without modification or adapter.
• Bench tested on actual hardware: We ran this battery through full charge and discharge cycles on the ICONpet platform. The BMS responded correctly to motor-start inrush current and held voltage steady under sustained suction load on carpet.
• Dock charging habit for ICONpet vacuums: Remove the battery from the charging dock once it reaches full charge. The ICONpet dock does not cut trickle current automatically — leaving the battery docked indefinitely accelerates cell degradation faster than normal cycle wear.

Suction dropping before the battery indicator reaches low

On the ICONpet platform, the motor draws significantly more current when the filter is partially blocked or the brush roll is restricted by pet hair. That elevated draw causes pack voltage to sag earlier than the indicator expects, so suction feels weak while the LED still shows a charged state. The BMS reads voltage under load — not resting voltage — and begins throttling output to protect the cells. Clean the filter and clear the brush roll before assuming the battery is at fault; a clean airpath drops motor draw back to rated current and the voltage sag disappears.

Motor cuts out mid-session then restarts after a short pause

This is a BMS overcurrent trip, not a battery failure. When the ICONpet motor sustains a restricted suction path — blocked filter, clogged hose, or matted pet hair in the brush roll — current spikes beyond the BMS protection threshold and the pack shuts output off. The BMS resets automatically after the cells cool slightly, which is why the vacuum restarts after 15–20 seconds. To stop the cycle from repeating, clear the restriction first, then confirm the filter is clean and seated correctly before restarting.