#12v macbook pro magsafe 2 charger full
The measurements in the table above are from Cherie’s laptop, a mid-2008 2.4GHz MacBook Pro, with the screen on full brightness.This is an example of why you should never leave wall-wart power supplies plugged in when you are not actively using them! The Apple power brick has a parasitic drain of 0.3A (4 watts) when plugged in, even when no laptop is connected.Here are a few other interesting notes and observations… You’ll notice that our small Xantrex 400W inverter inserts about 10 watts of overhead, and our large 1500W Xantrex Freedom 458 Inverter/Charger wastes over 20 watts of power just by being fired up! I took some measurements to see how much power we are saving by using a DC-to-DC power supply, rather than needing to convert from DC-to-AC-to-DC via an inverter and the standard Macintosh power brick: Configuration We have been particularly thrilled with no longer needing to power up our DC-to-AC inverter to power our laptops. We checked out the Kensington All-In-One, and it has quickly become one of the most indispensable items in our technology arsenal. These supplies offer a true go-anywhere replacement for Apple’s power brick, only they are much more versatile. And for $229 you can get a MagSafe-equipped Kensington or iGo universal power supply that is slim, light, and runs off of both AC and DC, including from EmPower jacks found in many airliners. His cheapest option ($60) involves you sending him your laptop power supply to convert, or for $165 he will include a new Apple power brick that he has modified for you. Mike Lee of has made a business of taking genuine Apple MagSafe tips, and splicing them onto 12v compatible power supplies.
#12v macbook pro magsafe 2 charger license
But without a license from Apple, they just aren’t going to chance it. There is no technical limitation preventing Targus, Kensington, or iGo from producing MagSafe compatible tips for their universal notebook power supplies. Unfortunately, Apple has not released a 12v car-charger of their own, and they have threatened to send an army of lawyers after any third-party power supply manufacturer that dare introduce a MagSafe-compatible power cable. We would much rather run our lives directly off of 12v as much as possible. Sure, we could use an inverter – but (as you will see) that inserts a lot of overhead and inefficiency. As full-time technomads living in a small solar-powered trailer, we have ample access to 12v DC, while 120v AC is a rare luxury for us. One particular frustration that has vexed me for over three years now is that there is no “official” way to power any MagSafe-equipped Apple laptops directly off of 12v power. It is indeed an ingenious bit of technology, and it has probably prevented an untold amount of damage over the years. The MagSafe holds the power cable to the side of a MacBook with a magnet so that you (or your pet!) tripping over the power cord does not risk hurling your laptop to the floor. One of Apple’s niftiest proprietary technologies is the MagSafe power cable tip that has been used on all of Apple’s recent laptops.
Apple is a great company in many ways, but they are often frustratingly proprietary too.
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