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I forgot my macbook pro charger at a friends place and I won't have it for a week. I saw that there are 3rd party chargers being sold for half the price of official chargers. Can 3rd party chargers damage my macbook pro? After I get my normal charger back in a week I will be mostly using that one and keep the new one as an extra, so I won't be using it fulltime.

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    Don't do it. Believe me, you'll be a lot better off with spending a little more and buying an official Apple charger. – RedEagle2000 Sep 7 '15 at 17:13
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It's unlikely they will actually damage your MacBook Pro by delivering too much power to it. But there are many cautionary tales to be found on the internet of third party chargers overheating, and occasionally catching fire or exploding. Technically, using a non-Apple charger without Apple's written permission may also void your warranty if anything did go wrong.

Personally, I wouldn't risk it.

  • Exactly, I absolutely HATE 3rd-party chargers! I hear all too often about someone who bought a charger for 3¢ on eBay and it burns their house down. Always, always, ALWAYS buy official chargers. – RedEagle2000 Sep 7 '15 at 17:23
  • I've seen some scary hot running third party adapters. Luckily many of them are easily discovered to be of shoddy construction, but some that look absolutely genuine are also dangerous. Caveat emptor. – bmike Sep 7 '15 at 20:11
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Even an Apple charger can damage a Mac. It's far, far more rare since Apple tends to have superior QA and more motivation to make sure the adapter fails over the computer than the average knock off manufacturer.

That being said, there are many good chargers that will work just fine. The main risk is fire from a poorly constructed transformer as opposed to down stream damage to your Mac since the magsafe port delivers between 3 V and 25 V DC it's not a huge amount of power or danger to life or hardware.

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Yes it may hurt your battery, you need to be very careful when using 3rd party products. The charger needs to be compatible with your battery, check the information on it (input/output values - how many V and A), if they are the same as your original one then you shouldn't worry much. Still this doesn't guarantee that it won't damage the battery or the mac.

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Try Nekteck PD 65W charger, it worked pretty good for me and it's certified by USB-IF. https://www.amazon.com/Nekteck-Certified-Delivery-PixelBook-Nintendo/dp/B0721KG2Q7

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