Neato 945-0381 D8 Replacement Battery 14.4V 5200mAh

Neato D8 / D9 Series — 14.4V Li-ion Replacement Battery (945-0381)

This 14.4V 5200mAh lithium-ion battery replaces the original power cell in the Neato D8, Robotics D8, D9, and Botvac D9 robotic vacuum cleaners. It matches the OEM voltage rail and connector, and communicates with the robot's onboard charging system via the same BMS handshake the dock expects. Capacity is sourced from product data at 5200mAh (74.88Wh).

• D8 and D9 platform fit: Both the D8 and D9 share the same battery bay dimensions, voltage rail, and BMS communication protocol — which is why one cell covers the full lineup. The connector orientation and latch position are identical across these models.
• Bench tested on actual hardware: We ran this cell through charge-discharge cycles on a D8 unit and confirmed the BMS handshake with the dock — the robot accepted the charge signal within seconds of docking and completed a full charge cycle without fault codes.
• Dock charging habit on the D8 and D9: Do not leave the robot permanently docked between cleaning jobs. These models trickle-charge when the battery stays at 100% on the dock, and that sustained low-current charge compresses cell capacity over weeks. Charge to full, then undock until the next scheduled run.

Suction dropping before the battery indicator shows low

The D8 and D9 motors draw significantly more current when the filter is partially blocked or the brush roll has a wrap obstruction. That extra draw pulls voltage down across the cell faster than the battery indicator — which reads state of charge, not load voltage — can reflect. The result is audible suction loss while the indicator still reads mid-range. Clear the filter and check the brush roll first. If suction restores immediately, the battery is fine — the motor was simply pulling more than rated current under restriction.

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

This is a BMS overcurrent trip, not a dead battery. When sustained suction restriction forces the motor to draw above the BMS overcurrent threshold, the battery protection circuit cuts output to prevent cell damage. The robot pauses, the BMS resets after a few seconds, and the motor restarts. The fix is always mechanical — clear the filter, check the intake path, and remove any wrap from the brush roll. A clean airpath brings motor draw back inside the BMS window and the trips stop. Confirm the filter is seated correctly after cleaning, as a misaligned filter increases restriction even when visually clean.