About this replacement
Shark RV850BRN / RV850C Series — 14.4V Li-ion Replacement Battery (RVBAT700-N)
This is a 14.4V 2600mAh Li-ion battery pack for the Shark RV850BRN, RV850C, RV850WV, RV851WV, and compatible models in that line. It replaces OEM part RVBAT700-N and fits the same bay and connector as the original. Capacity is rated at 2600mAh (37.44Wh) — matching factory spec.
- RV850 series fit: These models share the same 14.4V power rail, battery bay dimensions, and BMS handshake protocol. The connector locks and the BMS communicates with the robot's charge management circuit the same way the original does.
- Bench tested on actual hardware: We ran this pack through charge and discharge cycles on the RV850 platform. The BMS held cutoff thresholds correctly at both ends — no premature low-voltage shutoff and no overcharge event observed.
- Dock charging behaviour on the RV850 series: Do not leave the vacuum sitting on the charging dock permanently. The RV850 line does not fully interrupt charge current when the pack reaches capacity — continuous dock parking accelerates cell degradation. Charge to full, then remove from dock until the next use.
Suction dropping before the battery indicator reaches low
This happens when the motor draws more current than the pack can sustain at mid-charge — voltage sags under load even though the indicator still reads mid-range. A partially clogged filter is the most common trigger: restricted airflow forces the motor to pull harder, spiking draw and causing a voltage dip that the robot reads as insufficient power. Clean the filter first. If suction recovers immediately after cleaning, the battery was not the root cause. If suction still drops with a clean filter and a fresh charge, the original pack has lost enough capacity that voltage sag is occurring under normal motor load.
Motor cuts out mid-run then recovers on its own
This is a BMS overcurrent trip, not a motor fault. When airflow is restricted — blocked brush roll, full dustbin, or a clogged post-filter — the motor strains to maintain suction and current draw spikes past the BMS threshold. The BMS cuts power to protect the cells, the obstruction effectively reduces load, current drops, and the BMS resets. Clear the brush roll, empty the dustbin, and check the post-motor filter. If the cutout stops after clearing those, you have confirmed the cause — no battery replacement needed.