ETA 5241 Aurum Replacement Battery 14.4V 5200mAh BP14452C

ETA 5241 Aurum / 6241 Aurum — 14.4V Li-ion Replacement Battery (BP14452C)

This is a 14.4V, 5200mAh Li-ion replacement battery for the ETA 5241 Aurum and 6241 Aurum cordless stick vacuums. It replaces OEM part BP14452C (also cross-referenced as 98600). Voltage, connector, and BMS communication all match the original specification.

• 5241 and 6241 Aurum compatibility: Both models run the same 14.4V power rail and use the identical BP14452C battery connector and BMS handshake. One cell fits either unit without modification.
• Bench tested on actual hardware: We cycled this cell through the ETA charging circuit and confirmed BMS handshake, charge acceptance, and cut-off under load. The overcurrent protection tripped correctly when airflow was restricted to simulate a blocked filter — normal behaviour, not a fault.
• Dock charging practice for ETA stick vacuums: Do not leave the vacuum sitting on the charging dock between every use. The ETA Aurum dock applies a continuous trickle once full, and Li-ion cells in this voltage class degrade noticeably faster when held at full charge indefinitely. Charge to full, then remove from the dock.

Suction dropping before the battery indicator reaches low

This is a voltage sag issue, not a capacity issue. When the filter is partially blocked or the dust cup is full, the motor draws more current than rated. The battery's internal resistance causes voltage to sag under that elevated draw, and the vacuum's electronics read it as low power and reduce motor speed. The battery is not faulty — clear the filter and empty the dust cup first. If suction restores immediately, the cell is fine.

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

This is a BMS overcurrent trip. The ETA Aurum motor draws a surge current when suction is restricted — most often a clogged HEPA filter or blocked nozzle. The BMS reads that spike as an unsafe current event and disconnects the cell. After a brief cool-down, it resets automatically. Check and clean the filter; if the motor draws normal current through clean airflow, the battery will not trip again. If cut-outs continue on a clean filter, verify charger output is reaching 16.8V at end of charge cycle.