About this replacement
Redmond RV-UR365 — 18V Li-ion Replacement Battery (INR18650-5)
This is an 18V 2000mAh Li-ion replacement battery for the Redmond RV-UR365 cordless handheld vacuum cleaner. It uses INR18650-5 cells and fits directly into the RV-UR365 battery compartment. Order this when the original pack no longer holds charge or the vacuum shuts off well before the indicator reaches low.
- RV-UR365 fit: The RV-UR365 runs an 18V motor rail with a BMS that monitors cell voltage and current draw. This pack matches that voltage rail and connector, so the vacuum's motor controller reads the battery correctly on startup.
- Bench tested on actual hardware: We cycled this pack through multiple charge and discharge runs on a vacuum motor load. The BMS held the cutoff voltage steady and did not trip under normal suction draw.
- Dock charging on cordless vacuums: Do not leave the RV-UR365 sitting on the dock permanently. Cordless vacuums on continuous dock charge develop capacity fade significantly faster than those charged only when depleted. Charge to full and remove from the dock.
Suction dropping before the battery indicator shows low
The RV-UR365 motor draws more current when the filter is partially blocked or the suction path is restricted. That extra draw causes the cell voltage to sag under load, even when resting voltage still looks healthy. The BMS registers the sag and reduces output to protect the cells — suction drops noticeably. Check and clean the filter first; if suction restores, the battery was not the cause.
Motor cutting out mid-use and then recovering after a short pause
This is a BMS overcurrent trip, not a dead battery. Sustained restricted airflow — blocked filter, sealed nozzle, or heavy carpet load — pushes motor current above the BMS threshold. The BMS cuts power to protect the cells, then resets once current demand drops. Clear the restriction, then resume use. If the cutout happens repeatedly on open airflow, check that resting cell voltage is above 15V before ruling out the pack.