This is an old revision of the document!
You will need to charge your batteries!
At a typical Maker Faire you might get 10 Amp of 120 volt power to your pit. Keep that in mind when choosing a charger.
The charger you choose will also have to work with the batteries you use. SLA are different than Lipo, etc.
Someone should write a lot more about battery chargers here!
See Also: Battery Charging Tips