Bissell Pet Stain Eraser 20037 Replacement Battery 7.4V 2600mAh

Bissell Pet Stain Eraser 20037 — 7.4V Li-ion Replacement Battery (3419)

This 7.4V 2600mAh Li-ion battery replaces OEM part number 3419 in the Bissell Pet Stain Eraser 20037 portable carpet cleaner. It fits the handheld unit used for spot-cleaning pet stains and odours from carpet and upholstery. Capacity is 19.24Wh — matched exactly to the product data, not estimated from third-party sources.

• Pet Stain Eraser 20037 fit: The 20037 uses a compact 7.4V two-cell Li-ion pack with a specific BMS handshake. This replacement matches that voltage rail and connector format so the charger recognises the pack and completes the charge cycle normally.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the 20037 platform. The BMS engaged correctly at low-voltage cutoff, the charger handshake completed without fault codes, and the motor drew current within rated parameters throughout the test.
• Dock charging on the 20037: Do not leave the 20037 sitting on its charging base permanently. The unit trickle-charges when docked and the cell is already full — this degrades capacity faster than normal use cycles. Charge to full, then remove it from the dock.

Suction dropping before the battery indicator reaches low

The 20037 motor draws more current when airflow is restricted — a partially blocked filter forces the motor to work harder than rated. This extra draw causes voltage to sag across the cell before the indicator registers a low charge state. The result is noticeably weaker suction while the LED still shows adequate battery. Clean or replace the filter first — if suction recovers, the battery is not the problem.

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

This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked nozzle, clogged filter, hair wrap on the brush — the motor pulls current above the BMS trip threshold and the pack shuts output to protect the cells. The BMS resets after a short thermal recovery window, which is why the unit starts again after a pause. Clear the blockage before the next run and check the filter is seated correctly — a loose filter seal bypasses the airflow path and triggers the same trip at 7.4V operating voltage.