Lipos and charger for me.

[E-Revonut]

Side note - If money is tight and you can't afford a power supply right away yes you can use a car battery, just don't have the car running! Some chargers such as the duo allow up to 26Volt input, so you could actually wire to car batteries in parrallel and the charger would be more efficcient.

I also agree with Neil on the Neu or TP lipos as they are Enerland cells, on that note polyquest, flightpower and enerland(they have their own brand) are all good choices. Stay away from MaxAmps, a few have been having good luck with their new cells but until they have been proven stay away!

Hyperion chargers will most likely be your best bet. Thats all I've used so far for charging lipos and I will most likely stay with them. A built in balancer and user friendly make them a great choice. They aren't the cheapest option but you generally get what you pay for.