ROVUS BL500N 14.8V Cordless Vacuum Replacement Battery 2600mAh

ROVUS BL500N / BL500 / BL517 — 14.8V Li-ion Replacement Battery

This is a 14.8V, 2600mAh (38.48Wh) Li-ion battery for the ROVUS BL500N, BL500, and BL517 cordless stick vacuums. It slots into the same battery compartment as the original and uses the same connector and BMS communication protocol. Capacity figure comes from the product specification — 2600mAh at 14.8V nominal.

• BL500 series platform fit: The BL500N, BL500, and BL517 share the same 14.8V battery rail, connector pinout, and BMS handshake requirements — which is why one cell pack covers all three models without modification.
• Bench tested on actual hardware: We ran this pack through charge and discharge cycles on the BL500N. The BMS handled motor-start inrush current without tripping, and the protection circuit engaged correctly at low-voltage cutoff.
• Dock charging habit on the BL517: Do not leave the vacuum sitting on the charging dock between every use. Continuous dock charging forces a sustained low-level current through the cells and accelerates capacity fade. Charge to full, then remove it from the dock until the next session.

Suction dropping before the battery indicator reaches low on the BL500N

This happens when a partial blockage or a clogged filter forces the motor to draw more current than its rated load. The BMS reads the elevated draw as a voltage sag event and begins throttling output to protect the cells — even though the indicator still shows charge remaining. The vacuum feels like it's running out of battery when it's actually reacting to restricted airflow. Clear the filter and check the hose path before assuming the battery is the problem.

Motor cutting out mid-use then recovering after a few seconds

This is a BMS overcurrent trip, not a mechanical fault. When suction is restricted — blocked filter, full dust cup, or a wedged obstruction — the motor draws a sustained surge above the BMS cutoff threshold. The protection circuit opens, the motor stops, and then resets once current drops. The fix is not a battery swap. Clean the filter, empty the dust cup, and check for blockages. If the cutoff keeps triggering on a clear machine, measure pack voltage at rest — a healthy cell should hold above 15.5V after a full charge.