What is "battery" in chess terms

Can someone help me define. I'm not liking the answers I'm coming across on the Internet. Thanks.

No.

The Wikipedia entry seems to do it justice. https://en.wikipedia.org/wiki/Battery_(chess)
I had always understood a battery to be a combination of rooks and queens on the same rank or file aimed at the enemy king's position. Wikipedia cites current popular usage to also include bishops and queens along the same diagonal, still aimed at the enemy king. The term battery was, and still is, used to describe a group of cannons aimed at the same target. It doesn't refer to batteries used to store electricity.

Well, I sort of figured out when I was a kid that chess didn't operate on batteries, thank you for the understanding, I just thought there was another term used to describe it. I think I was thinking of "rooks on seventh rank", or something to that nature.  Thanks again Gomer.

A battery may be considered any formation consisting of two or more pieces on the same rank, file, or diagonal; however, a battery is generally considered to be two Rooks or a Rook and a Queen controlling a file. A special type of battery is Alekhine's Gun, comprised of both Rooks backed up by a Queen on an open file. (See diagram below). It is hard to refute the attack of a well-aimed battery.Diagram from Wikipedia

Even better answer! It even has a diagram. Thank you so much connors! 

A two-cell electric battery is better than one cell. In the same way, a two-cell chess battery is better than one cell. For electricity, a two-cell battery has more electric power. A two-cell chess battery has more attacking power. Here the "cell" refers to a long range piece. If there are two or more "cells" in the chess battery, those "cells" must be lined up in one direction they can all move in.