Display

Battery Checker - Check Your Battery Status Online

Check your battery level, charging status, and time-to-full estimate right from the browser.

#1Battery Checker

45%

Discharging

Battery level45%

StatusDischarging

Time remaining1h 35m

Supported Browsers

The Battery Status API is currently available in Chromium-based browsers such as Chrome, Edge, and Opera. Firefox and Safari have disabled it for privacy reasons, so battery information cannot be read there. Mobile devices (Android Chrome) are supported as well.

What This Battery Checker Shows

Your current charge level, whether you're charging, and rough estimates of time to full or empty — visible instantly from the browser without digging into system settings.

The remaining-time figures are estimates based on your current usage. Start a video or change tasks and they swing widely, so read them as a guide.

How to Make Your Battery Last

Don't routinely drain to 0% — deep discharges accelerate wear
Don't sit at 100% on the charger constantly; 20-80% is the friendly range
Avoid heat: a parked car in summer or direct sun is especially punishing
Lower your screen brightness — one of the biggest single savings
Close apps you're not using; background network activity quietly drains charge

Battery Draining Faster Than It Used To?

Batteries are consumables — every charge cycle slightly shrinks what they can hold. A device a few years old lasting half what it did is usually just this aging.

That said, a single misbehaving app running in the background causes the same symptom. Check the battery usage breakdown in your device settings for anything unfamiliar near the top.

If the battery is swollen or unusually hot, stop using the device immediately.

What this tool can display depends on your browser and device. Missing fields mean the device doesn't expose that information.

Frequently Asked Questions

Q. No information is displayed

A. Your browser may not support the Battery Status API. It works in Chrome / Edge / Opera, but Firefox and Safari currently do not support it (due to changes in the specification).

Q. Is the estimated time to full charge accurate?

A. The value comes straight from your OS, so it varies with charger output and battery condition. Accuracy tends to improve as the level rises. If it reads Infinity, the estimate is still being calculated or no charger is connected.

Q. Does it work on desktop PCs?

A. Desktop PCs without a battery may return placeholder values such as 100% / charging. Meaningful readings come from laptops, tablets, and smartphones.

Q. Is it safe for a website to read my battery info?

A. The Battery Status API was scaled back over privacy concerns and now exposes only the battery level and charging state. It cannot access your name, location, or other device information.

What Is the Battery Status API?

About the Battery Status API

The Battery Status API (Battery API) is a W3C-standardized Web API that lets JavaScript read the battery state of your device. It provides four values: level, charging state (charging), estimated time to full charge (chargingTime), and estimated time until empty (dischargingTime).

How This Tool Checks Your Battery Level

This tool calls the navigator.getBattery() method to obtain a BatteryManager object and monitors each value in real time. When the battery state changes, an event fires and the display updates automatically.

Battery Lifespan and Health

Lithium-ion batteries degrade gradually with every charge cycle. To extend battery life, avoid extreme heat and cold, and keep the charge level between 20% and 80% where possible. Check your battery regularly, and consider a replacement if it drains unusually fast.