Check the battery report in Windows using `powercfg /batteryreport`
Open the battery report file in your browser and review design capacity, full charge capacity, and cycle count
Compare full charge capacity to design capacity
Check battery health in BIOS or UEFI diagnostics
Use the laptop manufacturer’s battery utility or support app
Check battery status in Windows Settings under Power & battery
Use Task Manager to view current battery performance details
Run built-in hardware diagnostics from the startup menu
Check battery health in macOS by holding Option and clicking the battery icon
Open System Settings and review Battery Health or Battery Condition
Use third-party battery monitoring tools
Look for signs of battery wear such as rapid drain, unexpected shutdowns, or swelling