@lekky True, but that doesn't always matter.
@asphyxsia There is a difference. Your PC is already powered up, converting the AC power to DC power. If you plug a charger into the wall, it's powering up another AC/DC inverter. OK, it's not going to save the world, but every little helps.
Your PC will simply draw more amps, thus more power whilst you charge.
Yes your PC is getting it's power, but the more it does, the more it will use. You';; use more power than a dedicated charger.
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