Greetings! I'm the proud owner of a lovely Maxed out Macbook Pro 15" mid 2012. Its a 2.7Ghz model, with 16Gb of ram, and a 1tb hard drive. Sadly the Power brick has been ticking to the sorts and i think its on its way out. My apple care ran out in August on this machine and all apple offered was a new charger for $99. So I've been looking on Amazon and was wondering have people tried these power bricks with USB's or even battery packs with the chargers? https://www.amazon.com/Wakeach-Port...42287&sr=1-5&keywords=magsafe+charger+battery Still looking for a battery pack one.. Thoughts?