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AC power adapter for MacBook, MacBook Pro, and MacBook Air. Uses a self-aligning magnetic connector that disconnects safely when tugged. First-generation (2006-2012) MagSafe chargers have a slightly thicker, L-shaped connector. Available in 45 W, 60 W, and 85 W versions.

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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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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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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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The MagSafe cords have a chip ID to tell the system what it is. Teardown and exploration of Apple's Magsafe connector

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!

Apple Portables: Troubleshooting MagSafe adapters

Counterfeit Macbook charger teardown: convincing outside but dangerous inside

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anyone know’s a good source for 85W magsafe 1 cables?

The ones I got off ali and ebay, all identify as 60W.

Since there are knockoff chargers that report as being 85W, I guess that there are cables with the right chip inside the magsafe connector. And the people responding here that the cable has nothing to do with this, you don’t know what you are talking about. The chip where the smc communicates with is located on a small pcb (where the pin’s are on), inside the magsafe connector.

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There really is no source for the MagSafe cords. The ones you find on eBay are the ends of cut off fake chargers someone got ahold of.

I really don't recommend repairing the MagSafe chargers as more often than not you'll either endup damaging your system which would be a more expensive repair or Zap your self as you can't really seal the case back or worse you burn your house down.

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