How Much Power Does A Laptop Charger Consume. Just a small correction Watts measures power not energy. MacBooks come in two sizes.

Can I use a laptop charger to power my monitor. How much electricity does a TV use on standby. Check the laptops status.
You can assume that the amount a single charger would waste is far less than that.
Answer 1 of 10. Assume 60 watts for calculation. When charging the laptop battery power consumption will increase 10 to 20 percent we estimate that 60 watts is average power consumption for a 14-15 inch laptop when plugged in. 100-240V25A 50-60Hz My question is how much power Watts do I need to charge my laptop.

