About this replacement
Hoover ATHN30GR011 / ATN300B Series — 30V Ni-MH Replacement Battery (48006266)
This is a 30V, 3000mAh Ni-MH replacement battery for Hoover cordless stick and handheld vacuums using OEM part number 48006266. It fits the ATHN30GR011, ATN300B, ATN300B013, and ATV30RM011 among others. Capacity is sourced from product data at 3000mAh (90Wh) — not estimated.
- ATN300B and ATHN30GR011 platform fit: These models share the same 30V voltage rail, battery connector format, and BMS communication protocol. A battery built to the correct cell count and BMS spec slots in without modification.
- Bench tested on actual hardware: We ran this cell pack through charge, discharge, and BMS trip cycles on a compatible unit. The BMS accepted the pack without fault codes, and the overcurrent cutoff triggered correctly under simulated motor blockage.
- Dock charging habit on Hoover stick vacs: Do not leave this vacuum sitting on the charging dock continuously. Hoover stick vacs on permanent dock charge develop capacity fade faster than units charged only when depleted. Charge to full, then remove from the dock.
Suction dropping before the battery indicator reaches low
This happens when the motor draws more current than the battery can sustain at that state of charge. Ni-MH cells show a steeper voltage sag under load than the indicator circuit expects, so the vacuum loses effective suction while the LED still shows adequate charge. A partially blocked filter makes this worse — restricted airflow forces the motor to work harder and pulls higher current from the pack. Clean the filter first, then test suction on a full charge cycle.
Motor cuts out mid-clean and then recovers after a few seconds
This is a BMS overcurrent trip, not a dead battery. When the filter is restricted or the vacuum picks up a blockage, the motor draws a sustained current spike that crosses the BMS protection threshold. The BMS cuts power to protect the cells, then resets once the draw drops. Check and clear the filter and any blockage in the floor head first. If the motor cuts out on a clean filter and clear airway, the BMS trip threshold may be set lower than the motor's start-up draw — verify the pack is at or above 27V before use.