Sometimes you have to just live with it and this is one of those times. You can call it what you like, I get what you're talking about when you do and have no problem with it. Now others might ask you what you're talking about.
Here's a ponder for you though, calling it a cells as you did is wrong. A cell is a group of batteries in a set that increases power. When it is one, it's a battery. So several batteries make a cell not several cells make a cell. Well they do but that would imply several batteries in a cell, then the individual cells are connected to create a larger cell.