Check whether a battery is still good, and look up voltage thresholds for 11 formats and 18 chemistries.
- Step-by-step check: type, chemistry, voltage
- From AA and 9V to CR2032 coin cells
- English and German
Open tool
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Tools
Side projects that do one job well. They run right here as interactive islands.
Type a time in any zone and see it in yours. Correct across daylight-saving changes.
- Search zones by name, city or offset
- Presets for Nintendo Direct, Apple Events…
- Live world clock
Open tool
- Runs in your browserEverything is computed on your device.
- No sign-upOpen a tool and start using it.
- Works on any screenDesigned for phones as much as desktops.