Zebot Z320 Cordless Vacuum Replacement Battery 14.4V 2000mAh

Zebot Z320 — 14.4V Ni-MH Replacement Battery

This is a 14.4V, 2000mAh Ni-MH replacement battery for the Zebot Z320 robotic vacuum. It fits the Z320 specifically and restores cordless operation when the original cell has lost capacity or failed entirely. Voltage and chemistry match the original — no modifications required.

• Z320 fitment: The Z320 runs a 14.4V Ni-MH architecture that powers both the drive motors and the suction mechanism from a single cell pack. Any replacement must match both voltage and chemistry — a Li-ion substitute at the same voltage will confuse the Z320's charge circuit, which expects Ni-MH charge curves.
• Bench tested on actual hardware: We ran this cell through the Z320's charge cycle and monitored BMS behaviour under simulated motor load. Charge acceptance was normal across the full Ni-MH delta-peak detection window, and the pack reached rated capacity without thermal anomaly.
• Dock charging habit on the Z320: Do not leave the Z320 sitting on the charging dock between cleans permanently. Ni-MH cells in continuous trickle charge degrade noticeably faster than those charged only when depleted. Charge to full, then remove from the dock.

Suction dropping before the battery indicator reaches low on the Z320

Ni-MH cells show a voltage sag under high motor draw even when nominal charge level appears adequate. On the Z320, the suction motor pulls hardest on dense carpet or when the filter is partially blocked — this extra draw collapses cell voltage faster than the indicator expects. The indicator is calibrated for light-load discharge curves, so it can still show mid-range while the pack is already sagging under real motor demand. Clean the filter first; if suction still drops early, the cell is likely below usable capacity and needs replacement.

Z320 motor cuts out mid-clean then restarts after a short pause

This is a BMS overcurrent trip, not a dead battery. When airflow is restricted — blocked brush roll, clogged filter, or a debris jam — the suction motor draws sustained current above the BMS threshold, which shuts the pack down as a protective measure. After a brief cool-down, the BMS resets and the unit restarts. The fix is mechanical: clear the brush roll, tap out the filter, and check the suction path for blockage. If cut-outs continue on a clean, unobstructed machine, check cell voltage under load — a degraded pack sags to the BMS trip point faster, triggering the same symptom at 12V or below.