How to check
Depending on your Surface device, you can use one of two tools to check the capacity: the Surface Repair Tool or the Surface Diagnostic Toolkit.
The Surface Repair Tool supports the latest Surface models. When you run it, the tool automatically checks whether your device is compatible. If your device is not supported, use the Surface Diagnostic Toolkit instead.
If the battery capacity falls below 70% of its designed capacity (battery wear level is more than 30%), you can replace it if you would like to have more battery capacity.
Run the Surface Repair Tool
Select Start
, search for Surface Repair Tool, then select it in the list of results.
If it's not installed, download it from Microsoft Store.Expand the Battery information section.
Using a calculator, divide the number listed for the Full charge capacity by the number listed for the Design capacity to determine the percentage of remaining capacity.
Run the Surface Diagnostic Toolkit
Open the Surface Diagnostic Toolkit. If it's not already installed, you can download it from the Microsoft Store.
In the left pane, select Battery information to expand it.
Review the following details:
Designed capacity: The original battery capacity when the device was new.
Current capacity: The maximum charge the battery can currently hold.
Wear level: The percentage of battery capacity lost over time.
Note
- If you are using the Surface Diagnostic Toolkit on a work device, go to Surface Tools for IT and download the Surface Diagnostic Toolkit for Business. Learn more.
Battery replacement options
Battery replacement options vary based on device, location, warranty status, and coverage, and may include paid services, conditional protection‑plan benefits, or customer‑initiated self‑repair . You may have several options for replacing your battery such as:
Authorized Service Provider support: Microsoft works with Authorized Service Providers (ASPs) who may offer in-person service for your device. Availability varies by country and region. Learn more about Authorized Service Provider support
Battery replacement service through Microsoft: Battery replacement may be available under certain Microsoft Protection Plans, subject to applicable eligibility requirements, claim limits, and other terms and conditions. Learn more about Battery replacement service through Microsoft
- Battery replacement may be available under certain Microsoft Protection Plans, subject to applicable eligibility requirements, claim limits, and other terms and conditions.
- See Warranty and Protection Plan Terms & Conditions for details.
- Your device may be eligible for out-of-warranty battery replacement through Microsoft. Service availability and costs vary by device.
Replace your own battery: Select replacement components are available for purchase through Microsoft Store and instructions are available in our Service Guides. Self-repair should be performed by skilled technicians following Microsoft’s instructions*.
*Replacement components may be available and can be replaced on site by a skilled technician following applicable Microsoft Service Guides. Availability of components, tools, and service options may vary by product, market, and over time. Opening or repairing your device can present risks, including electric shock, device damage, fire, personal injury, and other hazards. Use caution if undertaking do-it-yourself repairs, and only do so if you have the appropriate knowledge, experience, and tools. Except where required by law, any damage to the device or components resulting from repair is not covered under Microsoft’s Limited Hardware Warranty or protection plans. For more information, see Surface service options and Warranty and Protection Plan Terms & Conditions.