Is it more energy efficient to use batteries or plugs?

Question

Is it more energy efficient to use electronic devices that use batteries or plugs?

Answer 1

convenience comes at a price, i agree with michael m

Answer 2

Plugs. Batteries are produced overseas and incur shipping expenses, fuel for the boat which emits smog, jobs taken from the states and ...do I need to go any further??

Answer 3

Plugs; because to get electricity you can use solar panel ( energy from the sun) or waterpower etc. :D