The SI unit of charge is the Coulomb.
Both a proton and an electron have a charge of
1.60217662 × 10-19 coulombs
With a proton having a positive charge with this magnitude and an electron having a negative charge of this magnitude.
An Amphere-Hour is 3600 multiplied by one Coulomb.
Let me know if you have questions about the units of electric charge.
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