Eureka H11 Cordless Vacuum Compatible Battery 29.6V 2500mAh

Eureka H11 Handheld Cordless Vacuum — 29.6V Li-ion Replacement Battery (BP28825A)

This is a 29.6V, 2500mAh Li-ion replacement battery for the Eureka H11 handheld cordless vacuum cleaner. It fits directly into the H11 and restores full motor power after the original cell has degraded. Part number BP28825A confirms fitment with the H11 platform.

• H11 platform fitment: The H11 series runs a 29.6V motor rail that pulls variable current depending on surface load — carpet draws significantly more than hard floor. This cell matches that voltage rail and carries the BMS communication the H11 charger expects before it will begin a charge cycle.
• Bench tested on actual hardware: We ran this battery through the H11's full charge handshake and confirmed the BMS reported cell status correctly to the charger. Under simulated motor load we saw no unexpected cutoffs at the rated draw for hard floor or carpet modes.
• Dock charging habit on the H11: Do not leave the H11 sitting on the charging dock permanently between uses. Continuous dock contact exposes the cells to low-level trickle current that accelerates capacity fade. Charge to full, then remove the vacuum from the dock until the next use.

Cordless vacuum losing suction before the battery indicator reaches low

This happens when the motor is drawing more current than the BMS expects — usually because a partially blocked filter forces the motor to work harder to maintain airflow. The BMS reads the elevated draw as a potential overcurrent condition and reduces power to the motor before the fuel gauge registers low. The vacuum feels like it is losing suction while the indicator still shows charge remaining. Clean or replace the filter first, then test suction — a clear filter drops motor current back to normal draw and the cutback behaviour stops.

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

This is a BMS overcurrent trip, not a failed battery. When suction is restricted — blocked nozzle, clogged filter, or hair wrapped at the inlet — the motor stalls slightly and current spikes above the BMS threshold. The BMS shuts the output rail, the motor stops, and after a short thermal or timer reset the BMS re-enables and the motor restarts. Clear the blockage completely before the next run. If the trip happens again on a clean filter and clear nozzle, check that the replacement cell voltage reads at least 29.6V at full charge before use.