Privacy Policy
Last updated November 10, 2026
This policy explains what information Battery Runtime Calculator (batteryruntimecalculator.com) collects and how it is used. The short version: the calculators run in your browser, we do not ask for personal information, and we do not use advertising or tracking cookies.
What you enter in the calculators
Everything you type into a calculator is processed in your browser and is not sent to us. When you change an input, the values are added to the page address so you can bookmark or share a result. That address stays on your device unless you share it.
Information stored on your device
If you switch between light and dark themes, your choice is saved in your browser’s local storage so the site remembers it. No other data is stored on your device by this site, and we do not set cookies.
Server logs and analytics
The site is hosted on Cloudflare. Like any web host, Cloudflare processes technical information such as IP addresses to deliver pages and protect against abuse. We may use Cloudflare Web Analytics to count visits; it does not use cookies, does not track you across sites, and gives us only aggregate statistics such as page views and countries.
Advertising
The site does not currently show advertising. If we add it, we will update this policy before ads appear, explain which advertising partners are used and what data they process, and ask for consent where the law requires it.
If you email us, we use your address and message only to reply, and we do not add you to any mailing list.
Children
The site is a general-audience reference tool and does not knowingly collect information from children.
Your rights
Because we hold no personal data from calculator use, there is usually nothing to access or delete. If you have emailed us and want that correspondence deleted, or have any privacy question, contact hello@batteryruntimecalculator.com.
Changes
When this policy changes, the date at the top changes too. Significant changes, such as adding advertising, will be described here before they take effect.