If you've played the lovely boardgame Galaxy Trucker you've experienced how awkward and fiddly it is to use the tiny (but beautiful) battery tokens.
These shiny green tokens fit quite snuggly in this battery model. Using green stuff or other kind of plaster (even just glue) you can fill in the bottom and your battery is ready for use. Painting optional but recommended. Here's my attempt.
The design has little "pips" on the side so the battery doesn't roll away on the table like an annoying perfect cylinder. Now the battery has the option of sitting upright and is very comfortable to pick up.