We have this robot cart (picture below). It has pull-out drawers to fit tools and important things in (such as bolts). We have a matching battery cart (image not available
). On the door we have hanging chargers (5 to be exact). Then on shelves inside the unit (positioned so that the chargers go into the shelves) we place our batteries, multimeter, drill battery chargers., and other battery related items. The only problem I have with our battery cart is that cables and other things have to be in their exact places or the unit won't shut properly. However, I've had no problem with our robot cart.