AC adapter for MacBook, MacBook Pro, and MacBook Air

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Change 85W magsafe broken cable with new one, but detected as 60W

Anyone has experience with purchase magsafe cord from ebay, and assembly it to 85W magsafe, but with new cord the magsafe detected as 60W.

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don't use broken power adapter. it may damage your macbook.

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The chip which communicates with the mac's SMC through the onewire circuit is responsible for storing the serial number (which your mac derives the AC adapter wattage from) is located in the head of the charger (the part with the orange/green LED). The mac doesn't transfer any information between itself and the AC adapter block, only power.

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So, anybody has reference where I can buy the magsafe cord replacement that support 85W power Adapter?

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does it matter if it reads as a 60w - it will/should still charge your mac - or do you have problems charging?

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AGAIN ... there is no 85W, 65W or 45W cable specific to the charger ... a cable is a cable is a cable .... its only purpose is to carry voltage ... you can grab one off auction sites online ... maybe have a look at fixit's store as they might cary them aswell .... this is not a complicated fix but if not done right, you could damage the charger and maybe also the laptop if you decide to blind test on a laptop (probably your own ...

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Yes, the cable is non wattage-specific, but there is an integrated circuit inside the cable head (where the little light is) where it connects to the MagSafe charger that contains a readable serial number, which contains wattage information that the Mac uses.

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All the cables are the same. There is no cable that is specific to Wattage.

Are you sure it's an 85 Watt charger ?

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We've stopped fixing the MagSafe chargers as we have found either the case repairs breakdown exposing the innards which could be a shock or fire hazard!

In addition, if you short out the leads (wire them incorrectly) you can fry your MacBooks logic!

Best to bit the bullet here and get a real Apple MagSafe charger. You'll be safer, your house will be safer & so will your Mac!

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yes you have to watch out to connect it properly and also close it properly ... this is the 1 thing i actually use crazy glue on

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Yes, I am sure. My magsafe got its pins stuck, so I only replace the magsafe cord. But cannot power on 15 MBP immediately.

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yes ... if you are able to replace the cord itself it should work properly :) MagSafe 1 likes to melt on the inside of the connector to the laptop and they can get quite hot

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The magsafe connector has a small chip inside which is programmed with the magsafe psu serial number and other data including the power rating. If you put a cable from a 60W supply on to an 85w supply it will report it as a 60W supply with the serial number from the old unit.

eBay/Ali express replacement cables carry the same problem and have all 0000 serial numbers. same as aftermarket chargers.

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The wall ac power may be low if it's on a power bar

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ericktan will be eternally grateful.
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