How it works
Fill in the 2 fields above and Battery Life Calculator calculates the result instantly, recalculating as you change any value. The math runs locally in your browser — nothing is sent to a server.
Examples
- Capacity 2000 mAh, Current draw 150 mA → Battery life: 11h 20m
Frequently asked questions
How do I use the Battery Life Calculator?
Enter your values in the 2 input fields and the result is calculated automatically as you type. Change any value to see the numbers update instantly.
Is my data private?
Yes. The Battery Life Calculator runs entirely in your browser. Nothing you enter is uploaded, saved to a server, or shared — it never leaves your device.
Is the Battery Life Calculator free?
Yes, it is completely free with no sign-up, no limits and no watermarks. Like every tool on electronics and the rest of the platform, you can use it as often as you like.
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