Lilin Robot LL-A320 Replacement Battery 14.4V 2000mAh

Lilin Robot LL-A320 Series — 14.4V Ni-MH Replacement Battery

This is a 14.4V, 2000mAh Ni-MH replacement battery for the Lilin Robot LL-A320, LL-A325, LL-A335, and LL-A336 robotic vacuum cleaners. It powers the drive motors, suction fan, and onboard navigation during automated cleaning cycles. Swap it in when the original cell no longer holds enough charge to complete a full floor pass.

• LL-A320 series compatibility: The LL-A320, LL-A325, LL-A335, and LL-A336 all run the same 14.4V motor rail and share an identical battery bay connector. One cell fits all four models without modification.
• Bench tested on actual hardware: We ran this cell through full discharge-charge cycles on the LL-A320 platform. The BMS communicated correctly with the charger, accepted a full charge without fault flags, and held voltage stable through high-draw carpet traversal.
• Dock charging habit on robotic vacuums: Do not leave the vacuum on the charging dock permanently. Ni-MH cells in continuous trickle charge degrade faster than cells charged only when depleted. Charge to full, then remove from the dock until the next cleaning cycle.

Suction dropping before the battery indicator reaches low

Ni-MH cells don't fail all at once — they sag under load first. When the suction motor demands peak current on thick carpet or a partially blocked filter, a degraded cell can't hold its voltage rail, so the motor slows before the battery gauge registers low. The indicator reads charge level at rest, not under load. If suction feels weak midway through a clean but the light still shows green, the cell's capacity has faded and the battery needs replacing.

Motor cutting out mid-cycle and then recovering after a pause

This is a BMS overcurrent trip, not a mechanical fault. When the filter is restricted or the brush roll is jammed, the suction motor draws sustained current above the BMS threshold — the battery disconnects to protect the cell, and the vacuum stops. After a short rest, the BMS resets and power returns. Clear the filter and check the brush roll for hair wrap first. If cut-outs continue on a clean filter with a fresh battery installed, test at 14.4V open-circuit before suspecting the charger or dock contacts.