About this replacement
iRobot Looj 330 Gutter Cleaning Robot — 7.2V Li-ion Replacement Battery (14570)
This 7.2V, 4000mAh Li-ion battery replaces part number 14570 in the iRobot Looj 330 gutter-cleaning robot. The Looj 330 uses this cell to power its auger motor and drive system as it moves through gutters dislodging leaves and debris. Capacity is rated at 28.8Wh, matching the original cell specification.
- Looj 330 compatibility: The Looj 330 and Looj 330 Gutter Cleaning Robot share the same battery bay dimensions, connector, and BMS handshake requirements — both accept the 14570 cell without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the Looj 330 platform and confirmed the BMS communicates correctly with the robot's power management circuit, including low-voltage cutoff behaviour at the correct threshold.
- Post-gutter-season storage: After the last gutter clean of the season, remove the battery from the robot entirely. Leaving the cell installed over winter in an unheated space accelerates capacity loss — store it indoors at around 50% charge until the next season.
Why the Looj 330 auger slows or stalls mid-gutter run
The Looj 330's auger and drive motors pull current simultaneously when the robot hits a dense debris pack. If the battery's internal resistance has risen — common in an aged cell — voltage sags under that combined load and the BMS may trigger a protection cutoff before the indicator shows critical. The robot appears to stall without warning. A fresh cell with low internal resistance holds voltage stable through that peak draw and keeps both motors running through the debris section.
Robot powers on but shuts off seconds after auger engages
This is a BMS overcurrent trip, not a motor fault. When the auger engages against a blockage or compacted debris, inrush current spikes sharply. A degraded battery cannot sustain that spike and the BMS cuts power to protect the cell. The robot restores power after a few seconds once the BMS resets. Clear the auger of any debris packing, confirm the battery is fully charged, and check that the cell voltage reads at least 8.0V off the charger before reinstalling.