And for reference, it takes around $10/year to run a single efficient indoor LED lightbulb. So charging a cell phone for a years-worth of usage costs less than

And for reference, it takes around $10/year to run a single efficient indoor LED lightbulb. So charging a cell phone for a years-worth of usage costs less than 1/10th of running an efficient LED lightbulb bulb for the full year. Again, cell phones are just confusingly not energy intensive.