Hoover S2211 Replacement Battery 6V 3000mAh Ni-MH

Hoover S2211 / S2211-100 — 6V Ni-MH Replacement Battery (H-59139247)

This is a 6V 3000mAh Ni-MH replacement battery for the Hoover S2211 and S2211-100 cordless stick vacuum. It replaces OEM part numbers H-59139247 and 59139247. Capacity figure is taken directly from product data: 3000mAh (18Wh).

• S2211 and S2211-100 platform: Both model variants run the same 6V cell pack with the same connector and BMS handshake, so one battery fits both. The voltage rail is shared across the motor and suction control board — no adapters or modifications needed.
• Bench tested on actual hardware: We ran this cell pack through charge and discharge cycles on the S2211 platform. The BMS accepted charge from the stock Hoover charger without fault codes, and the motor drew rated current without triggering overcurrent cutoff under normal suction load.
• Dock charging behaviour on the S2211: The S2211 charger does not terminate charge automatically when the dock detects full capacity. Leave the vacuum on the dock only until the charge light clears, then remove it. Continuous dock charging applies a trickle current that degrades Ni-MH cells faster than a regular charge-and-remove cycle.

Suction dropping before the battery indicator shows low on the S2211

The S2211 battery indicator reads state of charge from resting voltage, not under-load voltage. When the filter is partially blocked or the brush roll is restricted, the motor draws more current than rated — this causes voltage to sag under load even when the cell still holds charge at rest. The indicator shows adequate charge, but suction pressure drops noticeably. Clean the filter and check the brush roll for debris before assuming the battery is at fault; if the problem clears after cleaning, the cell is fine.

Motor cuts out mid-use and then recovers after a short pause

This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked filter, tangled brush roll, or a blockage in the hose — the motor load spikes past the BMS current threshold. The BMS cuts the circuit to protect the cell, and the motor goes silent. After a short pause the BMS resets and power returns. The fix is to clear the restriction first: remove the filter, tap it clean, and check the hose for obstructions. If the cut-out stops after cleaning, no battery fault exists.