Battery, how much?

[Zutankhamun]

A silly question but I wondered how much it costs to charge an 18650 battery? I get through a fair few but I am staying with parents and cannot be sure on the consumption as my father keeps the costs 'hush-hush'. Lets just say an average tarrif so round about 10 pence (18 cents) per kWh. Are they expensive to charge? Thanks Sos, a Samsung 25r 2500mah. Cheers

 

[Hoosier]

Um, about 0.01 kWh to charge one without taking into account inefficiency of the charger and the battery chemistry. Just a bit more than charging a typical cell phone. A modern TV consumes more power while off, but that's a different question...