said by viperm:
We have seen those before I called them "jars" same thing each one was like 1-2 volts each and they had liquid in them that was basically acid if I remember correctly..
Maybe you and insommniak are talking about the vintage Edison (Nickel-Iron) cells in clear containers. Here is a picture from Google of a modern version.
They have alkaline potassium hydroxide solution, not sulfuric acid.