Convert Elementary charge to Milliampere-hours
Convert Elementary charge (e) to Milliampere-hours (mAh) instantly and accurately.
Conversion Formula
mAh = e × 4.450490650e-20
About Elementary charge
The elementary charge (e) is the magnitude of charge on a single proton or electron, defined exactly as 1.602 176 634 × 10⁻¹⁹ C in the 2019 SI revision. It is the quantum of electric charge - the smallest freely occurring charge in nature - and underpins all atomic and subatomic physics. A current of 1 A corresponds to 6.241 509 × 10¹⁸ elementary charges flowing per second.
About Milliampere-hours
The milliampere-hour (mAh) equals exactly 3.6 C and is the universal capacity unit for portable-electronics batteries. Smartphone batteries range from 3 000-5 000 mAh; AA alkaline cells deliver ≈2 500 mAh; small lithium coin cells for RTC modules are rated 35-225 mAh. 1 mAh = 3.6 C = 10⁻³ Ah.
Quick Reference Table
| Elementary charge (e) | Milliampere-hours (mAh) |
|---|---|
| 1 e | 4.45 × 10-20 mAh |
| 2 e | 8.901 × 10-20 mAh |
| 5 e | 2.225 × 10-19 mAh |
| 10 e | 4.45 × 10-19 mAh |
| 25 e | 1.113 × 10-18 mAh |
| 50 e | 2.225 × 10-18 mAh |
| 100 e | 4.45 × 10-18 mAh |