Large Scale Central

LGB 2-4-0

So I decided to battery power the 2-4-0 (LGB 20232, UP w/sound). I’ve got the DPDT switch mounted in the cab to switch between battery and track power. Sound is also switch-off-able. I’m going to try to fit yet another first gen TE in the tender. One question:

I’ve got the size of the tender(don’t remember the measurements), yet only about an inch to an inch and a half thickness for a battery. Any recommendations on a 14-18 volt battery, 2000-3000mAh for this? Would prefer inexpensive since I’ll likely end up buying another for the 4-6-0 project, but more expensive ($50+) is doable if necessary.

Check out the 14.8V Li-Ion packs at All-Battery.com. Some are pretty small.

Edit to add ink: http://www.all-battery.com/148vli-iobbatterypacksandmodules.aspx