1 A unit-quantity of electricity used as a measure of the amount of electrical charge that may be obtained from a storage battery before it requires recharging. 2  Ampere-Hour Capacity -- The number of ampere-hours which can be delivered by a storage battery on a single discharge.
A: Bacteria obtain energy by either ingesting other organisms and organic compounds or by producing their own food. The bacteria that produce their own food are called autotrophs. Bacteria that must consume other organic molecules for energy are called heterotrophs.
1 Water -- Bacteria need water to dissolve the food they use for energy and growth. 2  Water allows the food to get into the cells, is used for the many chemical reactions necessary for life and growth, and allows waste products to escape. 3  Food/Nutrients -- All bacteria require energy to live and grow.