You could also find a cheap (but decent quality) 12v lead acid charger, along with a 12v lead acid battery and use that as your power supply. That way you can even do a few charges when you don't even have power, like if you go out the texas chainsaw massacre site to run your R/C?
“The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens
The battery can even be an old battery that was deemed unworthy for auto starting anymore.
“The modern astrophysical concept that ascribes the sun’s energy to thermonuclear reactions deep in the solar interior is contradicted by nearly every observable aspect of the sun.” —Ralph E. Juergens