ampere hour

ampere hour

Unit whose name includes an SI unit and a non-SI unit accepted for use with SI
Name Symbol Quantity SI units
ampere hour A h electric charge 3600 C
The ampere hour, or amp hour, symbol A h, is a non-SI unit of electic charge, accepted for use with the SI.
 
One ampere hour is equal to 3600 coulombs.
Definition e
1 \mspace{4mu} \text{A h} \mspace{6mu} = \dfrac{3 \mspace{4mu} 600}{1.602 \mspace{4mu} 176 \mspace{4mu} 634 \times 10^{-19}} \mspace{6mu} e\\ \\ \\ 1 \mspace{4mu} \text{A h} \mspace{6mu} \approx 2.246 \mspace{4mu} 943 \mspace{4mu} 266 \mspace{4mu} 805 \mspace{4mu} 874 \mspace{4mu} 539 \times10^{22} \mspace{6mu} e

The ampere hour is derived from the ampere (an SI base unit) and the hour (a non-SI unit accepted for use with SI).

current × time = charge SI units
1 A × 3600 s = 3600 A s 3600 C