Severin 61SR18650-2200 Cordless Vacuum Replacement Battery 22.2V

Severin 61SR18650-2200 — 22.2V Li-ion Replacement Battery

This 22.2V 2500mAh lithium-ion battery replaces the original pack in Severin cordless vacuum cleaners using OEM part numbers 61SR18650-2200, 6ICNMR19-66, 6IRS18650, and 6ISR18650-2500. It slots into the same cell bay and connects to the vacuum's existing BMS communication circuit. Capacity is 2500mAh (55.5Wh) — confirmed from product data, not estimated.

• Multi-part-number fitment: Severin used at least four OEM part numbers across this cordless vacuum line — 61SR18650-2200, 6ICNMR19-66, 6IRS18650, and 6ISR18650-2500. All reference the same 22.2V six-cell configuration and connector pinout, which is why one replacement pack covers the range.
• Bench tested on actual hardware: We cycled this pack through simulated motor loads at 22.2V nominal. The BMS held cutoff at the correct undervoltage threshold and did not trip on the motor start-surge current spike that cordless vacuum motors generate at ignition.
• Dock charging practice: Do not leave the vacuum sitting on the charging dock continuously. Severin cordless vacuums on permanent dock charge develop capacity fade faster than units charged only when the pack is depleted. Charge to full, then remove from the dock.

Cordless vacuum losing suction before the battery indicator reaches low

This happens when the motor draws more current than rated because airflow is restricted — typically a clogged filter or blocked brush roll. The extra draw causes voltage to sag under load even though the pack has charge remaining. The BMS reads that sag as a low-cell condition and throttles power to protect the cells. Clean or replace the filter first; if suction recovers immediately, the battery was not the problem.

Motor cuts out mid-clean, then recovers after a short pause

This is a BMS overcurrent trip, not a dead battery. When suction is blocked — by a dense carpet pile, a large debris jam, or a restricted filter — the motor stalls briefly and pulls a current spike beyond the BMS protection threshold. The BMS disconnects the output to protect the cells, then resets once current drops. Clear any blockage, check the filter, and confirm the pack voltage reads above 20V before assuming the battery has failed.