Check your battery level, charging status, and estimated time remaining — instantly in your browser.
Your browser doesn't support the Battery Status API. This is common on:
To check battery on iPhone: Settings → Battery. On Android: Settings → Battery or the status bar.
This tool uses the browser's Battery Status API to read your device's battery information in real time. The data updates automatically as your battery charges or discharges.
Level is your current battery percentage. Charging shows whether your device is plugged in. Estimated Time is the browser's prediction for how long until fully charged or fully discharged — this is an estimate based on current consumption rate.
Apple removed the Battery Status API from Safari in iOS 12 for privacy reasons — it was being used to fingerprint users. On iPhone, check your battery via Settings → Battery or the status bar percentage.
This tool reads your device battery status using the browser Battery Status API — showing current charge level, charging state, and estimated time to full charge or discharge. It works on Android devices, laptops, and Windows/Mac computers where browsers expose battery information.
Apple removed battery API access from Safari on iOS in 2019 citing privacy concerns — battery level data can theoretically be used for device fingerprinting. This is a Safari/iOS policy, not a hardware limitation. Android and desktop browsers still support battery access.
Battery health measures how much charge capacity remains compared to when the battery was new. A battery at 80% health holds 80% of its original charge. Lithium-ion batteries typically lose 20% capacity after 300–500 full charge cycles.
Keep charge between 20–80% for long-term health. Avoid frequent full 0–100% cycles. Use original chargers. Avoid extreme heat. Enable optimized charging features if your device supports them.
Replace when health drops below 70–75% (noticeable shorter usage time), when the battery causes shutdown before reaching 0%, or when physical swelling occurs (replace immediately — this is a safety hazard).
Open Command Prompt as administrator and run: powercfg /batteryreport. This generates a full battery report including design capacity vs current capacity, showing exact battery health percentage.
Hold Option and click the Apple menu → System Information → Power. Look for "Cycle Count" and "Condition." Or go to System Settings → Battery → Battery Health for a simpler view. Apple considers batteries with condition "Normal" healthy.
Battery time estimates are based on current power draw, which changes constantly. Running a heavy task like video rendering dramatically shortens the estimate, while idle usage extends it. The estimate stabilizes after a few minutes of consistent usage.