Ampere-hour
| ampere-hour | |
|---|---|
Rechargeable NiMH 1.2V batteries Top: AA battery (2500 mA⋅h) Bottom: AAA battery (1000 mA⋅h) | |
| General information | |
| Unit system | Non-SI metric unit |
| Unit of | Electric charge |
| Symbol | A⋅h, A h |
| Conversions | |
| 1 A⋅h in ... | ... is equal to ... |
| SI units | 3600 C |
| Elementary charges | 2.24694327×1022 e |
| CGS units | 1.0792528488×1013 statC |
An ampere-hour or amp-hour (symbol: A⋅h or A h; often simplified as Ah) is a unit of electric charge, having dimensions of electric current multiplied by time, equal to the charge transferred by a steady current of one ampere flowing for one hour (3,600 seconds), thus equal to 3600 A⋅s or Coulomb.
The commonly seen milliampere-hour (symbol: mA⋅h, mA h, often simplified as mAh) is one-thousandth of an ampere-hour (3.6 coulombs).