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I believe the problem may be with the charger cord, not the computer. I had an unfortunate accident and had to replace my macbook air after only 5 months. I did not even unpack the new charger, thinking the new one would be a backup. Good thing! 6 months later I started experiencing disconnects between the computer and the power cord because the magnet ...


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You propose an interesting data set that I have not yet found elsewhere, so I'll contribute my measurements: My genuine magsafe 2 85W charger (included with macbook pro purchase from Apple store): 315 g = body + US two-prong wall adapter + charging cable 297 g = body + charging cable 259 g = body only (charging cable resting on ground) My recent ...


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A good description can be found at Teardown and exploration of Apple's Magsafe connector Below is taken verbatim from the above link. The charger startup process When the Magsafe connector is plugged into a Mac, a lot more happens than you might expect. I believe the following steps take place: The charger provides a very low current (about 100 µA) 6 ...


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Mixing answers from @David Anderson and @Brandon : The inner large pins are V+ (16.5 VDC). Measuring with no load will give 6.86 VDC; the full 16.5 V is provided to the proper load. The outer large pins are Ground. The tiny center pin is a Charge Control pin that assists with changing the LED color, and also assists with switching the adapter ...



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