The noun battery has 7 senses (first 3 from tagged texts)
1. (21) battery -- (group of guns or missile launchers operated together at one place)
2. (10) battery, electric battery -- (a device that produces electricity; may have several primary or secondary cells arranged in parallel or series)
3. (2) battery -- (a collection of related things intended for use together; "took a battery of achievement tests")
4. battery -- (a unit composed of the pitcher and catcher)
5. battery, stamp battery -- (a series of stamps operated in one mortar for crushing ores)
6. barrage, barrage fire, battery, bombardment, shelling -- (the heavy fire of artillery to saturate an area rather than hit a specific target; "they laid down a barrage in front of the advancing troops"; "the shelling went on for hours without pausing")
7. battery, assault and battery -- (an assault in which the assailant makes physical contact)