The Wright Flyers Model Airplane Club offers a field box for sale.
This field box comes with the following:
A twelve-volt glow-plug battery and a power panel
• Tests show the battery to be good, but it is not new.
Charger for the glow-plug battery
Fuel Bottle
Two fuel hand-pumps
Priming syringe
Glow plug wrench
Prop reamer
Timer
Asking price: $20.00
Asking price is less than the cost of the 12-volt battery. Think of it as buying the battery and then getting paid to take the rest of the stuff!