The ampere-hour term is often used to state the capacity of electrical batteries. It is common to speak of milliampere-hour (mA h or mAh) which is one-thousandth of an amp-hour (3.6 coulombs). Knowing a battery’s milliamp-hour capacity and a circuit’s current requirements, the useful battery life can be calculated. Battery chemistry and size effect a battery’s amp-hour capacity. As a general rule, larger and heavier batteries have large ampere-hour capacities.

Portable electronics in medical, consumer, cellular, wearable tech and defense markets are seeking to shrink product size while simultaneously improving battery life. Batteries have a large impact on product size, cost and quality of experience. Triad customers take advantage of ASIC integration to reduce the overall power consumption of their electronics. This power reduction enables: (1) the use of smaller, less expensive batteries for the same battery life or (2) extended battery life without having to increase the amp-hour capacity (size, cost) of the battery.