Microsoft releases a new firmware update for its Surface devices(Surface Pro 3 and Surface Pro 4 at this moment). The update offers Battery Limit feature which once enabled, the battery charge will be limited to 50 percent of its maximum capacity. You should get the firmware update via the Windows update and even if you do not you can download from here(Surface Pro 3 | Surface Pro 4).
Just in case you are interested in the complete changelog. Below is the list of them for both Surface Pro 3 and the Pro 4.
Surface Pro 3Â
- Surface UEFI v3.11.2550.0 adds the Battery Limit feature.Â
- Surface Embedded Controller Firmware v38.14.80.0 adds the Battery Limit feature.Â
- Surface Integration v2.0.1350.0 adds the Battery Limit feature.Â
Surface Pro 4Â
- Marvell AVASTAR Bluetooth Radio Adapter v15.68.9125.57 improves system security.Â
- Marvell AVASTAR Wireless-AC Network Controller v15.68.9125.57 improves system security.Â
- Surface UEFI v108.2318.769.0 adds the Battery Limit feature.Â
- Surface Embedded Controller Firmware v103.2241.256.0 adds the Battery Limit feature.Â
- Surface Integration v1.0.176.0 adds the Battery Limit feature.Â
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