Yes, batteries is a Scrabble word!

Noun

1. Group of guns or missile launchers operated together at one place
2. A device that produces electricity; may have several primary or secondary cells arranged in parallel or series
3. A collection of related things intended for use together
4. A unit composed of the pitcher and catcher
5. A series of stamps operated in one mortar for crushing ores
6. The heavy fire of artillery to saturate an area rather than hit a specific target
7. An assault in which the assailant makes physical contact