how do you tell the difference between a 60-watt charger and an 85-watt charger?

Apple 85W MagSafe 2 Power Adapter (for MacBook Pro with Retina display)

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2 Answers from the Community

  • No need to do any math. If you have a genuine Apple charger the first line on the side (narrow side opposite of cable going to laptop) will state 85W MagSafe 2 Power Adapter.

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  • Look on the adapter's side. If like mine your vision is not good enough - shoot it with your iPhone and enlarge on a bigger screen. Wattage is voltage multiples by amperage (max current). If you see "Output: 20V = 4.25A max." it's 85 watt charger. Hope it helps.

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