NShi laptop battery for Microsoft Surface Pro 3 1631 7.6V 42.2Whr 4 cell

Direct replacement for Surface Pro 3 1631

This 4-cell lithium-ion pack is built to match the original Microsoft battery for the Surface Pro 3 model 1631. It delivers 7.6 V and 42.2 Whr from a 5547 mAh cell stack. The unit is intended for owners who need a like-for-like swap without changing chargers or firmware. Buyers with other Surface models or non-Microsoft tablets cannot use this pack.

Fixed 7.6 V output and proprietary connector

The battery communicates with the tablet over the OEM connector so the firmware can report capacity and health accurately. It supplies a single voltage rail and cannot be adapted for devices that expect a different cell count or voltage. Users who plan to run the tablet while charging from a non-OEM dock should verify that dock’s power profile independently.

Adhesive removal is the main difficulty

Replacing the pack requires heating the display adhesive, lifting the screen, and disconnecting the fragile ribbon cable before fitting the new unit and re-sealing with fresh adhesive strips. The most common issue is tearing the display cable or leaving gaps that weaken water resistance. No soldering is involved, but patience and a heat gun or iOpener are essential.