Delete comment from: Ken Shirriff's blog
Ken-
Thank you for the great article!
I'm confused: if the DS2413 chip is responsible for holding the 64-bit serial ID, then how do you explain the following?
I have been using a 45W Chinese knockoff charger with my 2011 Macbook Pro for some months. In System Report/Power the AC Charger Information had zeros for all fields.
However, my OEM 45W (2008MBA) charger WILL work with the 2011MBP if I unplug it, restart, then plug it back in... and the System Report fields get populated with similar data to what you posted.
The 2011MBP will attempt to block this 45W adapter (as you suggest) and will retain the charger's info. and continue to display it after I've switched it with the Chinese knockoff.
I didn't mention that the OEM charger has a replaced magsafe plug/cable that I bought off eBay - it is a Chinese knockoff - it should not have the DS2413 chip with the encoding (should it?)
And at present, I am still running my 2011MBP off both 45W adapters that both have generic/knockoff magsafe plugs/cables.
Are you sure that 'encoding' is not in the charger itself? I realize everyone claims there is no communication between the plug and charger, but how else does this explain how my 45W chargers with knockoff plugs work on a 2011MBP..?
If anything, it inspires me that an external battery source should be possible for MB's - us road warriors need access to extra battery, regardless of what Apple thinks.
Thanks again. I look forward to some insight!
J
May 9, 2015, 5:02:17 PM
Posted to Teardown and exploration of Apple's Magsafe connector