Mamirobot 12SC3000S1P Replacement Battery 14.4V 3000mAh

Mamirobot 416 / K3 / K5 Series — 14.4V Ni-MH Replacement Battery (12SC3000S1P)

This is a 14.4V, 3000mAh Ni-MH replacement battery for the Mamirobot robotic vacuum cleaner range. It fits the 416, 461, K3, and K5 models. Part number 12SC3000S1P matches the original cell pack format, voltage rail, and connector layout used across these units.

• 416, 461, K3, K5 compatibility: These models share the same 14.4V architecture, cell bay dimensions, and connector pinout. The BMS communication protocol is consistent across the range, so one cell pack covers all listed variants without modification.
• Bench tested on actual hardware: We ran this pack through full charge-discharge cycles on a 416 unit. The BMS accepted the charge handshake without fault codes, suction maintained consistent motor speed across the cycle, and low-voltage cutoff triggered cleanly at the correct threshold.
• Dock charging habit on robotic vacuums: Do not leave the Mamirobot on its dock permanently between cleans. Continuous trickle charging is one of the fastest ways to degrade Ni-MH cells in robotic vacuums. Charge to full, remove from dock, and return it only when the next charge is needed.

Suction dropping before the battery indicator reaches low

Ni-MH cells under load show a steeper voltage sag than the indicator circuit accounts for. When the filter is partially blocked or the brush roll has hair wrapped around it, motor current draw spikes. The battery voltage dips under that load, and the motor loses speed before the indicator has moved. Clean the filter and brush roll first — if suction stabilises, the cell pack is not the cause. If suction still drops on a clean filter with a fresh pack, check that the battery contacts are seating fully in the bay.

Motor cuts out mid-clean then recovers after a short pause

This is a BMS overcurrent trip, not a dead battery. Sustained restricted airflow — from a clogged filter or a blocked intake — forces the motor to draw above the pack's rated discharge current. The BMS cuts power to protect the cells, then resets after a brief cool-down. Clearing the blockage is the fix, not replacing the battery. If the same trip happens immediately after cleaning the filter on a replacement pack, measure pack voltage under load — it should hold above 12.5V during normal suction.