Electrolux PI92-6DGM Cordless Vacuum Compatible Battery 7.4V 4500mAh

Electrolux PI92-6DGM / PI92-4STN / RX92-4STN — 7.4V Li-ion Replacement Battery (4060002609)

This 7.4V, 4500mAh (33.3Wh) Li-ion battery replaces the original pack in the Electrolux PI92-6DGM, PI92-4STN, and RX92-4STN cordless stick vacuums. It fits directly into the battery slot on each of these models and communicates with the vacuum's onboard BMS. If your original pack no longer holds charge or cuts out mid-clean, this is the direct replacement.

• PI92 and RX92 platform fit: The PI92-6DGM, PI92-4STN, and RX92-4STN share the same battery bay dimensions, connector pinout, and 7.4V voltage rail. The BMS handshake protocol is identical across all three, so one cell fits all without adapter or modification.
• Bench tested on actual hardware: We ran this battery through charge and discharge cycles on the PI92 platform. The BMS engaged overcurrent protection correctly under simulated blockage load and released cleanly once load was removed. Cell voltage held within spec across the full discharge curve.
• Dock charging practice for this vacuum: Do not leave the vacuum sitting on the charging dock permanently. Continuous dock connection keeps the cells in a trickle-charge state, which accelerates capacity fade in Li-ion packs faster than on any other cordless vacuum charging pattern. Charge to full, then remove from the dock.

Suction dropping before the battery indicator reaches low

This happens when the motor draws more current than the BMS's continuous-output threshold — typically caused by a partially blocked filter or full dust container, not a weak battery. As restriction builds, the motor works harder, pulling higher current at the same 7.4V rail. The BMS responds by throttling output to protect the cells, and suction drops noticeably even though the indicator still shows charge remaining. Clean the filter and empty the container first — if suction recovers, the battery is not the cause.

Motor cuts out completely then recovers after a few seconds

This is an overcurrent trip, not a dying battery. When sustained airflow restriction forces the motor to spike current demand beyond the BMS cutoff threshold, the BMS shuts output off as a protection measure. After a few seconds the BMS resets, power returns, and the cycle repeats if the restriction is still present. Check the filter for blockage and inspect the brushroll for tangled debris — remove the restriction and the cutouts will stop. If the problem persists on a clean, unobstructed vacuum, measure resting cell voltage; it should read between 7.2V and 8.4V.