Ecovacs Deebot D650 Replacement Battery 6V 3300mAh

Ecovacs Deebot D650 Series — 6V Ni-MH Replacement Battery (LP43SC3300P5)

This is a 6V 3300mAh Ni-MH battery pack for the Ecovacs Deebot D650, D660, D680, and D710 robotic vacuum cleaners. It slots into the underside battery bay and powers the drive motors, navigation sensors, and suction system. Voltage and capacity match the original LP43SC3300P5 specification exactly.

• D650 / D660 / D680 / D710 platform fit: These models share the same 6V battery bay, connector pinout, and BMS communication protocol — one cell services the entire group without modification.
• Bench tested on actual hardware: We cycled this pack through full charge and discharge on a D660 unit. The BMS accepted the cell, reported charge state correctly to the dock, and current draw stayed within rated limits across hard-floor and carpet test runs.
• Dock charging discipline for Deebot robots: Do not leave the robot sitting on the charging dock indefinitely between cleans. Ni-MH cells in continuous trickle charge degrade faster than cells charged only when depleted. Charge to full, then remove from the dock if the robot won't run again for several days.

Suction dropping before the battery indicator reaches low

Ni-MH cells under load show voltage sag before they are genuinely depleted. On the D650 series, the suction motor draws a surge current when it hits a restriction — a partially blocked filter, a tangle in the brush roll, or a transition from hard floor to thick carpet. That surge pulls voltage down momentarily, which the robot reads as a low-battery state and responds to by reducing motor speed. The fix is to check and clean the filter first, then assess whether the cell itself has lost capacity after a few full charge cycles on the replacement pack.

Motor cuts out mid-clean then recovers after a few seconds

This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked filter, jammed brush, or debris in the intake — the motor draws sustained high current to maintain speed. The BMS cuts power to protect the cell, then resets after a short cooldown. If it trips repeatedly on the same clean, the issue is the restriction, not the battery. Clear the filter and brush roll, then run a full clean cycle to confirm the trip stops occurring.