Rolando RA 201 S Cordless Vacuum Replacement Battery 14.4V

Rolando RA 201 S — 14.4V Ni-MH Replacement Battery

This 14.4V Ni-MH battery pack replaces the original power cell in the Rolando RA 201 S cordless vacuum cleaner. It carries 4000mAh capacity and matches the voltage rail the motor controller expects. Drop it in when the original pack no longer holds charge through a full cleaning session.

• RA 201 S motor compatibility: The RA 201 S motor controller runs on a 14.4V rail. A cell that delivers even slightly lower nominal voltage under load causes the controller to throttle suction output early. This pack holds the rail steady through the discharge curve, keeping suction consistent until the pack is genuinely depleted.
• Bench tested on actual hardware: We cycled this pack through repeated load tests matching the RA 201 S motor draw. The BMS handled sustained draw without nuisance trips, and voltage under load stayed within the motor controller's operating window across all test cycles.
• Dock charging practice on Ni-MH cells: Ni-MH chemistry is sensitive to trickle charge. Do not leave the RA 201 S sitting on the dock after the charge cycle completes — continuous dock charging accelerates capacity fade on Ni-MH packs faster than on lithium chemistries. Charge to full, then remove from the dock.

Suction dropping before the battery indicator reaches low on the RA 201 S

This is a voltage sag symptom, not a capacity problem. When the filter is partially blocked, the motor draws more current than rated to maintain airflow, pulling cell voltage down faster than the discharge curve predicts. The battery indicator reads remaining charge, not current voltage under load — so the indicator can still show mid-range while suction has already dropped noticeably. Check and clean the filter first, then retest. If suction holds after a clean filter, the pack is fine.

Motor cuts out briefly then recovers mid-clean

This is a BMS overcurrent trip, not a faulty battery. When the filter or brush roll is restricted, sustained high current draw triggers the pack's protection circuit to cut output momentarily. The BMS resets automatically once current drops, which is why the vacuum recovers after a few seconds. Clear the filter and brush roll of debris, then confirm the pack reaches at least 14.4V on a resting charge before ruling out the cell itself.