Shark X1725QN Cordless Vacuum Replacement Battery 4.8V 3000mAh

Shark X1725QN / V1930 Series — 4.8V Ni-MH Replacement Battery (VAC-V1930)

This is a 4.8V, 3000mAh Ni-MH battery for the Shark X1725QN, V1700Z, V1930, and Sweeper VX1 cordless stick vacuums. It replaces OEM part VAC-V1930 when the original cell no longer holds a usable charge. Capacity is rated at 14.4Wh — matching the original specification.

• X1725QN, V1700Z, V1930, Sweeper VX1 compatibility: These models share the same 4.8V battery rail, physical housing, and connector pinout. One replacement cell covers the full group without modification.
• Bench tested on actual hardware: We cycled this cell through the Shark vacuum's motor load profile. The BMS held stable across repeated draw spikes during carpet-mode operation, with no premature cutoff detected at rated voltage.
• Dock charging habit on the X1725QN: Do not leave this vacuum sitting on the charging dock between uses. Continuous trickle charging accelerates capacity fade in Ni-MH cells faster than in lithium chemistry. Charge fully, then remove from the dock.

Suction dropping before the battery indicator reaches low

On the V1930 and X1725QN, suction loss that arrives before the low-battery light triggers is almost always a motor voltage sag issue, not a failed cell. When the filter is partially blocked, the motor draws above its rated current. That extra load pulls the cell voltage down under load, reducing airflow even though the resting voltage still reads acceptable. Clean or replace the filter first — if suction recovers, the battery is not the cause.

Motor cuts out mid-clean and then restarts after a few seconds

This is a BMS overcurrent trip, not a dead battery. Sustained restricted airflow — from a blocked filter, full dustbin, or a hair wrap on the brush roll — forces the motor to draw beyond the BMS's current threshold. The protection circuit opens, the motor stops, and once the cell temperature drops slightly, the circuit resets. Clear the restriction, confirm the dustbin is below capacity, and check that resting voltage after reset is above 4.5V before continuing use.