Candy 25.9V Cordless Vacuum Compatible Battery 2500mAh

Candy Hoover Haier — 25.9V Li-ion Replacement Battery

This 25.9V, 2500mAh lithium-ion battery fits Hoover and Haier cordless stick and handheld vacuum cleaners sold under the Candy group. It replaces the original pack when the existing battery no longer holds a charge or causes the vacuum to cut out mid-use. Voltage and cell count match the original, so the BMS handshake proceeds without errors on compatible units.

• Hoover and Haier cordless vacuum platform: These vacuums share a 25.9V (7-cell) lithium-ion architecture across multiple stick and handheld configurations. The battery connector and BMS communication protocol are consistent across this voltage rail, which is why one pack covers both brand lines.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a 25.9V cordless vacuum unit. The BMS held cutoff thresholds at both ends — no false low-voltage trips during motor start and no overcharge flags at the top of the charge curve.
• Dock charging behaviour: Do not leave this vacuum on the charging dock permanently. Cordless vacuums on continuous dock charge develop capacity fade significantly faster than those charged only when depleted. Charge to full and remove from dock.

Suction dropping before the battery indicator reaches low

This happens when the motor draws more current than the BMS expects under load — usually caused by a partially blocked filter, not a failing battery. A restricted filter forces the motor to work harder, pulling amps above the pack's rated discharge threshold. The BMS interprets this as an overcurrent condition and reduces output before the fuel gauge registers low. Clear the filter first, then retest. If suction stabilises, the battery was not the cause.

Motor cutting out briefly and then recovering during use

This is a BMS overcurrent trip, not a dead battery. When suction is sustained against a blockage — carpet pile, debris jam, or a clogged pre-motor filter — current draw spikes. The BMS cuts power to protect the cells, then resets once load drops. The fix is to clear the blockage and clean the filter before assuming the pack is faulty. If the behaviour continues on a clear path, check that the terminal voltage under no load reads at or above 24V.