Haier TAB-T550WSC Replacement Battery FL2600 14.8V 2600mAh

Haier TAB-T550WSC / TAB-T560H — 14.8V Li-ion Replacement Battery (FL2600)

This is a 14.8V 2600mAh Li-ion replacement battery for the Haier TAB-T550WSC and TAB-T560H cordless vacuum cleaners. It carries OEM part number FL2600 and slots into the same battery compartment as the original. When the factory cell stops holding a useful charge, this unit restores full cordless operation.

• TAB-T550WSC and TAB-T560H compatibility: Both models run the same 14.8V four-cell Li-ion architecture with an identical connector and BMS handshake protocol. One battery covers both vacuums without modification.
• Bench tested on actual hardware: We ran this cell through discharge cycles under simulated motor load and confirmed the BMS holds the 14.8V nominal rail without premature cutoff. Cell balance across all four Li-ion cells remained within spec at end of discharge.
• Dock charging practice for this vacuum: Do not leave the TAB-T550WSC or TAB-T560H sitting on the charging dock indefinitely. Cordless vacuums on continuous dock charge develop capacity fade significantly faster than those 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 rated due to a restricted airflow path — usually a partially blocked filter or full dustbin. The BMS reads the overcurrent spike as a low-cell condition and begins throttling power to the motor. The battery indicator does not reflect this because cell voltage has not actually fallen to the cutoff threshold. Clear the filter and empty the bin first; if suction recovers immediately, the battery is not the cause.

Motor cuts out briefly then restarts on its own

This is a BMS overcurrent trip, not a dead battery. When suction is sustained against a blockage or heavy carpet pile, current draw spikes beyond the BMS protection threshold and the circuit opens. The BMS resets itself after a few seconds once the overcurrent condition clears, which is why the motor restarts without you touching anything. Check the filter for blockage, then run the vacuum on a clear hard floor — if the cutout stops, the filter was the cause. If cutouts continue on a clean filter, measure the resting cell voltage; it should read above 15.6V after a full charge.