John, I concur with Don. Bob has one of the finest custom battery shops nearby who can make any battery shape in various levels of power. Also their battery charger delivers a very sophisticated charge and it also has it's own circuit breaker built in. I have seen Bob put R/C in some real unusual packages.
Now I have 8 battery powered locos controlled with a simple key fob. My observation is that for a small indoor layout just attach your two wires and have at it. However I am building this basement pentapus (5 branch line octopus) and hit a wall with the final stage of wiring.
Anybody with a large layout REALLY needs to look closely at remote control battery power. After going through thousands of feet of track wire I threw in the towel. Time is money and you only have a finite amount of time on this rock.
