Shark XBAT3700 Cordless Vacuum Replacement Battery 3.7V 3400mAh

Shark V3700C Cordless Hard Floor Sweeper — 3.7V Li-ion Replacement Battery (XBAT3700 TYPE 2)

This is a 3.7V 3400mAh Li-ion replacement battery for the Shark Cordless Rechargeable Hard Floor Sweeper V3700C. It replaces OEM part numbers XBAT3700 TYPE 2 and 0081305-001. When the original cell degrades after repeated charge cycles, swapping to this unit restores the sweeper's cleaning performance.

• V3700C platform fit: The V3700C uses a compact single-cell 3.7V Li-ion pack with a specific connector footprint and BMS communication line. Both OEM part numbers listed above share the same cell format, voltage rail, and connector — this replacement matches that configuration exactly.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the V3700C platform. The BMS handshake initialised correctly, the charger accepted the pack without error, and voltage held steady across the draw cycle without unexpected cutoff.
• Dock charging habit on the V3700C: Do not leave this sweeper sitting on the charging dock permanently. Single-cell Li-ion packs in low-draw devices like this degrade faster under continuous trickle charge than under normal charge-and-remove cycles. Charge to full, then remove the unit from the dock.

Suction dropping on the V3700C before the battery indicator reads low

The V3700C motor pulls more current when airflow is restricted — a partially blocked filter or debris in the suction path creates sustained high draw. The BMS reads this as a voltage sag event and begins throttling motor output to protect the cell, even if the indicator still shows charge remaining. The result is noticeably reduced suction that looks like battery failure but is actually a load-protection response. Clear the filter and check the debris path first before concluding the battery is at fault.

Replacement battery not charging on the V3700C after fitting

Some V3700C chargers expect a BMS handshake before beginning the charge cycle — if the replacement cell's BMS does not respond within the expected window, the charger will not initiate charging and the indicator stays dark. Try seating the battery firmly and holding the unit on the dock for 60 seconds before concluding there is a fault. If the charger still does not respond, check the dock contacts for oxidation and clean with a dry cloth. The charger should show its charge indicator within 90 seconds of a correctly seated, compatible pack.