What is a Battery Leak?
It sounds like science fiction, but it's true. Most web browsers have a feature that lets websites see how much battery you have left. Originally, this was to help websites save power. But today, advertisers use this data for Fingerprinting. Because your battery level is very specific (like 65.4321%), it can be used to identify your device as you move from one website to another.
Wait, what about my VPN?
A VPN hides your IP address, but it cannot hide your battery level. Since this data is read directly from your hardware, a website can still recognize you even if you are using a VPN. AirOI Checker helps you see if your browser is leaking this hidden ID.
Why do companies track your battery?
Besides tracking your identity, some companies use your battery level for "sneaky" reasons:
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Surge Pricing: Some ride-sharing or travel apps might show you higher prices if your battery is very low (like 2%), thinking you will pay more because you're in a rush before your phone dies!
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Consistent Identity: Advertisers use your battery percentage to link your visits together across different sites without using cookies.
Frequently Asked Questions
Which browsers are the safest?
Firefox and Brave are great because they block this feature by default. Safari also protects your privacy. Chrome and Edge are often more "leaky," but you can use extensions to stay safe.
Can a hacker steal my files through my battery?
No. This isn't a virus risk. It only allows websites to read your power level and charging status. Your photos, files, and passwords are safe.
Is it 100% accurate?
Yes. AirOI Checker uses your browser's own system to see what it's telling the world. If we can see it, any other website can see it too!