Samsung NaviBot SR8940 14.4V Replacement Battery DJ43-00006B

Samsung NaviBot SR8940 / SR8950 / SR8980 — 14.4V Li-ion Replacement Battery (DJ43-00006B)

This is a 14.4V, 2000mAh lithium-ion battery replacing part number DJ43-00006B in the Samsung NaviBot robotic vacuum range. It fits the SR8940, SR8950, SR8980, and VCR8940 among others. Voltage, connector, and BMS communication match the original Samsung specification.

• NaviBot SR-series platform fit: The SR8940, SR8950, SR8980, and VCR8940 all share the same 14.4V battery bay, connector pinout, and BMS handshake protocol. One cell services the entire platform — no firmware differences between these models affect battery recognition.
• Bench tested on actual hardware: We ran this cell on a NaviBot unit and confirmed the BMS completed its initialisation cycle without fault codes. Charge acceptance was normal across all cells, and the protection circuit responded correctly to load draw from the drive motors and suction unit.
• Dock charging habit for NaviBot users: NaviBot units left on the charging dock between every run accumulate trickle-charge stress faster than most cordless vacuums because the dock maintains a top-up current continuously. Charge to full, then remove the unit from the dock until the next scheduled clean.

Suction dropping before the battery indicator reaches low on the SR8940

The SR8940's suction motor draws peak current when the filter is partially blocked or the brush roll meets thick carpet pile. If the cell has degraded, internal resistance rises and voltage sags under that load — the motor slows before the battery indicator registers a low state. The indicator reads state-of-charge at rest, not under load, so it lags behind real-world voltage drop. A fresh cell with lower internal resistance holds voltage flat under motor load and restores consistent suction through the full clean cycle.

NaviBot motor cutting out mid-run then recovering after a few seconds

This is a BMS overcurrent trip, not a dead battery. When suction is restricted — blocked filter, tangled brush roll, or the unit pressed into a corner — the motor strains against back-pressure and current spikes above the BMS threshold. The protection circuit cuts the output, waits for the spike to clear, then restores power. Clean or replace the filter first. If the cut-outs stop, the old battery was not the cause. If they continue on a clean filter, the original cell's BMS threshold has drifted low with age and the replacement cell will resolve it.