SnooKiwis6943

SnooKiwis6943 t1_j6267x9 wrote

Actually, in theory yes it does work. Current is equal to voltage divided by resistance (I=V/R). The higher the current, the faster the charge. The longer the charging cable, the more resistance that cable has and the lower the current is, resulting in a slower charge. Fun fact the wireless charging (mag safe) that Apple makes for the iPhone only comes with a built in cable that is of relatively short length and only available in that short length for this very reason. The mag safe uses induction charging which is very inefficient and requires a lot more amps to charge your phone. If the MagSafe charger had a longer wire, you would need more than the 20 watt charging block to power the charger due to the resistance in the longer wire.

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