Battery on a standard retractable stock?

Is it possible to have a regular retractable stock (not crane) and put a battery on it? I dont want to spend the money to have to buy a new crane stock battery if I decide to go with the crane stock. But my plan is to get a vest pouch to hold a large type battery, then velcro it to the outside of the stock. I dont see a lot of people do it, so Im not sure if its either a bad idea or Im just the only one thinking about it.

yes, you can do it, Only person needs to be happy is you.

They make mag pouches that Velcro to your stock just for that purpose.

i know a few guys that run that way