We are currently in the process of redoing every part of our team side projects such as, cart & crate, but we are also building a new battery charging station for the pits, and also to put on the cart.
I know that it will have a built in load tester, but I'm not sure how that will work, or what it will look like when it is finished.
Electrical is not really my area.
The box itself is pretty much complete though and you can see it here:
http://www.team237.com/gallery/Meeting-4/PDR_2116
I know that it is going to be wired up to just be a plug and charge box, and have a status indicator for every battery that is in there normal, and under load.
When we finish all these projects, I am probably going to upload some white papers on the cart, crate and battery box.