Choose Boot configuration > Advanced Options, and toggle Enable Battery Limit to On. Boot into Surface UEFI: Press Power + Vol Up when turning on the device. Modify Surface UEFI on an individual device Create a Surface UEFI configuration package for remote deployment to multiple devices. Modify Surface UEFI on an individual device. 64 GB Flash Storage, 2 GB RAM.Surface 3 has up to 10 hours of battery life for video playback so you can work, browse, play, or watch all day long. If you enable Battery Limit when your device is more than 50% charged, the battery won't resume charging until it drops below 50% of maximum charge.Įnable Battery Limit via one of the following methods: Processor Quad Core Intel Atom Z8700 1.6Ghz (2.4 GHz burst speed) Processor. When you enable the Battery Limit setting, the battery stops charging when it reaches 50% of maximum charge capacity. The Battery Limit UEFI setting is built into Surface devices by default including: I also use CCleaner to keep the hard drive free of junk and the Registry free of errors. My Surface has a small hard drive, so I dont save anything big in it. If you are still using the original Windows 7, upgrade to Windows 10. Examples include devices configured for point of sale, RFID, and related kiosk scenarios. I am using Windows 10 and it works great. This firmware setting (similar to BIOS) is recommended for devices intended to be always connected to power. 
The Battery Limit option is a Surface UEFI setting that changes how the Surface device battery is charged and may prolong its longevity.
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