2177 built one last summer, and it worked great for us this year. The best picture of it i have access to at the moment is here:
http://www.chiefdelphi.com/media/photos/34968
You can see it in the back right. Some benefits to this design:
- 4 chargers are fully wired and enclosed in the back
- 2 drill battery chargers are mounted on the front, easily accessible
- The status and control board for the chargers was routed to the front and put behind plexiglass below each station, allowing quick identification of charged batteries.
- 3 of the large KOP fans are included to provide sufficient airflow for the chargers (We finally used them for something!)
- It's mounted on heavy duty wheels - two fixed and two lockable casters - which allow it to easily traverse parking lots and bumps.
- It's sized to fit through a standard doorway
- It has an integrated power strip on the side, providing all the aux. power we need in the pits
- It has an integrated extension cord (25 feet, i think), with a mounted wrap to secure it when in transport
- It has an integrated on/off switch, which cuts power to the entire cart
- Half of it can be used for materials and parts storage at competition (and for transporting anything else heavy)
- It has a heavy duty surface (an old butchers block) that's big enough to work on and sturdy enough to wail on when needed, and at a great height for working on
- It has built in mounts to allow a vise to be secured
- It's sized to easily fit in the compartment under a standard coach bus, when tipped on its back
In short, it's much more than a battery cart. It's an all around competition cart, bigger than most of the charging stations listed here, but capable of being utilized for much, much more. The only problem we've had is in loading and unloading it - it took 4 adult mentors to get it on and off a truck, and we were straining a bit.
If you want some better pictures of it, PM me and i'll get them to you
