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Surface battery won’t charge or Surface won’t run on battery
Check that your power supply is working. Check for things that might prevent your Surface device or Windows from starting—or the battery from charging. Make sure that the connections are secure and that nothing is plugged in to the USB charging port on the power supply, if it has this feature.
What to do if your Surface power supply or charger doesn’t work
Check cables and reset your power supply unit: Disconnect the charger from your Surface, unplug the power cable from the power outlet in the wall, and then disconnect any USB accessories. Wait at least 10 seconds.
Surface power supplies and charging requirements - Microsoft Support
How to charge Surface. USB-C and Fast Charging for Surface. What to do if your Surface power supply or charger doesn't work. Find out which power supply unit goes with your Surface device.
How to charge Surface - Microsoft Support
When the power supply is connected to your Surface and plugged into a power source, the LED indicator on the tip of the charging connector will be lit when your Surface is getting power. If the LED indicator isn’t lit, you may have a problem with your power supply.
Caring for your Surface battery - Microsoft Support
To learn how to charge your battery to 100%, go to Smart charging on Surface. Review tips on caring for your Surface battery. Maximize the health and lifespan of the battery in your Surface device to get the most from it.
Troubleshoot problems with USB-C on Surface - Microsoft Support
Check your device specs to see if it supports USB-C. USB-C adapters don’t have an on/off switch or LED lights to indicate power, errors, or functionality. If your adapter isn’t responding, remove it and restart your device, then try using the adapter again.
Surface won’t turn on or start - Microsoft Support
If you're using Surface Dock, unplug your Surface from it. Try to turn on your Surface—if that works, the accessory may be the problem. If that didn't work, connect the power supply that was designed for your Surface. When your Surface is plugged in, charge it for at least 15 minutes.
USB-C and Fast Charging for Surface - Microsoft Support
If you connect a lower-voltage charger or a USB-A charger with a USB-A-to-USB-C cable, your device may charge slowly or not at all. It won’t use Fast Charging. Please connect a recommended charger instead.
Fix problems detaching or attaching your Surface Book keyboard
To fix this, charge your Surface Book until the green light comes on when you press the Detach key. If the keyboard doesn’t appear to be charging, see Surface won’t turn on, Windows won’t start, or the battery won’t charge.
Surface battery testing and estimated performance - Microsoft Support
Find out more about how Microsoft tests Surface devices to provide an estimate of battery performance. This article includes information on testing parameters and estimated battery performances by Surface device.