If a CB works on batteries, and I gave one to my friend here, we could talk to each other via these CBs? Distance of no more than 10 miles - would it work?
Would two walkie talkies work the same way and would work for the maximum of 10 miles to my friend's house?
Your friend should be well in range of a off the shelve cb and yes there are cb’s available that run off batteries or you could even make a set-up using a car battery.
Maybe on the 10 miles. Depends on the terrain and antennas.
No, hand-talkies won't work without a repeater like the ham radio operators use.
/johnny