# Did you know? Ampere vs Watt hours

**URL:** <https://forum.digikey.com/t/did-you-know-ampere-vs-watt-hours/61200>\
**Category:** Education\
**Tags:** terminology, faqs\
**Created:** [October 10, 2025, 1:25pm UTC](https://forum.digikey.com/t/did-you-know-ampere-vs-watt-hours/61200 "2025-10-10T13:25:49Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![makahdz.qoitech](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/makahdz.qoitech/32/49469_2.png) [@makahdz.qoitech](https://forum.digikey.com/u/makahdz.qoitech)\
**Post date:** [October 10, 2025, 1:25pm UTC](https://forum.digikey.com/t/did-you-know-ampere-vs-watt-hours/61200/1 "2025-10-10T13:25:49Z")

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![image](https://global.discourse-cdn.com/digikey/original/3X/b/a/ba8272a12a206ad7e2f374acbc4436db4284704d.jpeg)

**Ampere-hours (Ah) and watt-hours (Wh)** are both ways to measure battery capacity, but they represent different aspects. Ah measures the charge capacity, indicating how much current a battery can deliver over time, while Wh measures the energy capacity, indicating how much total energy the battery can store. The key difference lies in voltage: **Ah is useful for comparing batteries with the same voltage, but Wh is more accurate when comparing batteries with different voltages.**

#lowpowerglossary #batteryglossary