Shark XB768 SV769TD Replacement Battery 16.8V 2000mAh

Shark SV769TD Series — 16.8V Ni-MH Replacement Battery (XB768)

This is a 16.8V, 2000mAh Ni-MH replacement battery for the Shark SV769TD cordless stick vacuum. It also fits the SV769, SV769Q, and SV90Z models. When suction drops off or the original pack no longer holds a charge, this cell restores the vacuum to working condition without replacing the whole unit.

• SV769 and SV90Z platform fit: These models share the same 16.8V battery bay, connector pin layout, and BMS handshake protocol. One cell covers all of them without modification.
• Bench tested on actual hardware: We cycled this pack through full charge and discharge on SV769-series hardware. The BMS responded correctly to the charger signal, reached cutoff voltage cleanly, and held steady voltage under continuous motor load.
• Dock charging habit on stick vacuums: Do not leave the SV769TD sitting on the wall dock permanently. Shark's dock delivers a trickle current when the pack is full, and Ni-MH cells lose capacity faster under continuous trickle than they do from normal use. Charge to full, then remove from the dock.

Suction dropping before the battery indicator reaches low

The SV769TD motor draws more current when airflow is restricted — a partially blocked filter or a hair-wrapped brush roll pushes the draw above the cell's rated discharge rate. The BMS responds by pulling voltage down to protect the cell, which the vacuum reads as low power and reduces motor speed. The indicator light is tied to cell voltage, not charge percentage, so it lags behind what the motor is actually doing. Clear the filter and brush roll first — if suction recovers immediately, the cell is not the fault.

Motor cuts out for a few seconds, then restarts on its own

This is a BMS overcurrent trip, not a dead battery. It happens most often when the vacuum is held flat against thick carpet or when the nozzle gets sealed by debris — sustained restricted suction spikes the motor's current draw beyond the trip threshold. The BMS shuts the cell off, waits for current to drop, then re-enables it. The fix is to clear the blockage and check that the foam and felt filters are clean and fully dry. A wet filter causes the same trip pattern as a physical blockage.