Kaily 310A Cordless Vacuum Replacement Battery 14.4V 2000mAh

Kaily 310A / 310E — 14.4V Ni-MH Replacement Battery

This is a 14.4V Ni-MH battery rated at 2000mAh (28.8Wh), built to fit the Kaily 310A and 310E cordless stick vacuums. It replaces the original pack when capacity has faded and the vacuum no longer holds a useful charge. Voltage and connector match the stock configuration on both models.

• 310A and 310E shared platform: Both models run the same 14.4V power rail and use an identical battery housing, which is why a single replacement covers both. The BMS handshake and connector orientation are consistent across the 310 series.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a 14.4V Ni-MH compatible charger, confirming the BMS accepted the cell stack without fault flags and that voltage held stable through the discharge curve under simulated motor load.
• Dock charging habit on the 310 series: Do not leave the vacuum sitting on the charging dock permanently. Ni-MH cells in cordless vacuums develop capacity fade significantly faster under continuous trickle charge than those charged only when the pack is depleted. Charge to full, then remove from the dock.

Suction dropping before the battery indicator shows low

Ni-MH packs show voltage sag under sustained high current draw before the cell charge is actually depleted. On the 310A and 310E, a partially blocked filter forces the motor to draw more current than rated, which accelerates that sag. The vacuum loses suction noticeably while the indicator still reads mid-charge because the cells cannot sustain the voltage under that increased load. Check and clean the filter first — if suction recovers, the battery is not the root cause.

Motor cutting out mid-use and then restarting after a pause

This is a BMS overcurrent trip, not a loose connection. When restricted airflow — from a clogged filter or blockage — forces the motor to sustain a high draw, the BMS cuts the circuit to protect the cells. The brief pause allows the BMS to reset and the pack to recover slightly, so the vacuum restarts. Clearing the restriction stops the trip cycle at the source. If it persists on a clean filter with a fresh battery, check that the motor isn't laboring against a full dust canister.