Asked
— Edited
Comments made by my parents suggest i'm getting a rad for my birthday june 14(celebrating sooner) So I want to have a plan in place for what ill need to make the rad.
Diagram of possible rad
I thought that NiMH batteries should not be discharged lower than 1 volt. When a group of cell are wired in series and one cell drops below 1 volt it may not recover and charge with the proper polarity. In other words the cell becomes reversed.
A good second choice would be Sealed Lead Acid (SLA) batteries.
I don't know robot_Doc. I put my trust in ni-mh batteries anyways.
Here are the Final plans for the rad.