Zebot Z320 Replacement Battery 14.4V 3500mAh Ni-MH

Zebot Z320 — 14.4V Ni-MH Replacement Battery

This is a 14.4V, 3500mAh Ni-MH replacement battery for the Zebot Z320 cordless vacuum cleaner. It fits the Z320's battery compartment and restores power to the motor and suction system. When the original cell no longer holds a charge or capacity has dropped noticeably, this is the direct replacement.

• Z320 platform fitment: The Z320 operates on a 14.4V Ni-MH cell with a specific connector orientation and BMS communication profile. This battery matches that voltage rail and connector layout, so the charger and motor controller recognise it correctly on startup.
• Bench tested on actual hardware: We cycled this cell through the Z320's charge and discharge sequence. The BMS handled full charge termination cleanly with no false cutoff, and motor start current draw stayed within the cell's rated output without tripping overcurrent protection.
• Dock charging behaviour on the Z320: Remove the vacuum from the charging dock once the indicator shows full. The Z320's dock does not cut trickle current automatically — leaving it docked continuously accelerates Ni-MH capacity fade faster than intermittent use alone.

Cordless vacuum losing suction before the battery indicator reaches low

On the Z320, suction can drop well before the battery LED signals low charge. The cause is usually motor voltage sag under increased load — not actual cell depletion. A partially blocked filter forces the motor to draw above its rated current, which pulls cell voltage down under load even though resting voltage remains acceptable. Clean or replace the filter first, then retest suction performance before assuming the battery is at fault.

Motor cutting out mid-clean and then recovering after a short pause

This is a BMS overcurrent trip, not a motor fault. When airflow is restricted — blocked filter, clogged brush roll, or a hard-carpet pass with the intake sealed — the motor demands sustained high current. The BMS reads this as an overcurrent event and cuts the cell output to protect it. After a short pause the BMS resets and the motor restarts. Clear any blockage, confirm the filter is clean, and the trip threshold will not be reached under normal cleaning load.