Scarlett Robot Vacuum Compatible Battery 11.1V 2600mAh

Scarlett CS-PRC250VX — 11.1V Li-ion Replacement Battery

This 11.1V 2600mAh (28.86Wh) lithium-ion battery is a direct replacement for the Scarlett CS-PRC250VX robot vacuum cleaner. It restores full autonomous cleaning operation when the original cell has degraded through repeated charge cycles. Dimensions are 70.00 × 36.30 × 35.20mm — verify against your existing pack before ordering.

• CS-PRC250VX platform fit: The CS-PRC250VX uses an 11.1V three-cell Li-ion configuration to power both the drive motors and suction unit from a single pack. Replacing with a matched-voltage, matched-geometry cell keeps the BMS and motor controller operating within their expected input range.
• Bench tested on actual hardware: We cycled this cell through load draws replicating the CS-PRC250VX drive and suction motor demands. The BMS held undervoltage cutoff cleanly and recovered correctly on re-insertion after full charge.
• Dock charging on robot vacuums: Do not leave the CS-PRC250VX sitting on the charging dock between cleans. Continuous dock contact applies a low-level trickle current that accelerates capacity fade in Li-ion cells. Charge to full, then remove the unit from the dock until the next clean.

Suction dropping before the battery indicator reaches low

A degraded or partially discharged Li-ion pack sags under the combined load of the suction motor and drive wheels. The CS-PRC250VX suction unit draws more current across thick carpet or when the filter is restricted, pulling cell voltage down faster than the indicator updates. The vacuum interprets this as normal operation and does not flag a low-battery warning. Clean or replace the filter first — if suction recovers, the cell was being overloaded, not exhausted.

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

This is a BMS overcurrent trip, not a flat battery. When the suction path is partially blocked — clogged filter, tangled brush roll, or debris jam — the motor draws sustained current above the cell's protection threshold. The BMS disconnects the output to prevent cell damage, then resets once current drops. Clear the blockage and check that the filter is clean. If trips continue on a clean filter, the cell's internal resistance has risen too high and replacement is needed.