Ampere-hour or Amp-hour has a symbol of A h, A⋅h, or Ah, which is the measurement of total energy charge in a power source that can produce one ampere (1A) of current to a circuit for one hour (1h).

Two Rechargeable AAA Batteries

Rechargeable AAA battery rated at 900 mAh


A rechargeable AAA battery with a capacity rating of 900 mAh can produce

  • One ampere (1A) of current for 0.9 hours.
  • Or 500 milliamps (500 mA) of current for 1.8 hours.