Reddit reviews Powerbag Messenger Bag with Battery for Charging Smartphones, Tablets and eReaders, Black RFAP-0080F
We found 3 Reddit comments about Powerbag Messenger Bag with Battery for Charging Smartphones, Tablets and eReaders, Black RFAP-0080F. Here are the top ones, ranked by their Reddit score.
On-board removable battery with built-in PowerVine System delivers a 3000mAh charge directly to where it's needed. That's enough to charge the average smartphone twice.Easily accessible pockets include dedicated Apple and M2 connectors with micro and mini USBs that allow you to charge Android, Blackberry, and thousands of other portable devices. Apple connectors charge your iPhone, iPad, and iPod Touch.The full-sized internal USB port allows you to charge almost anything.Battery can be charged easily in or out of the bag with the included AC adaptorPadded pocket safely transports a 15" laptop, tablet, or other devices.
http://www.amazon.com/Powerbag-Messenger-Charging-Smartphones-RFAP-0080F/dp/B005J4O864/ref=sr_1_1?s=electronics&ie=UTF8&qid=1346947471&sr=1-1&keywords=power+bag
I was curious as well, and did some googling and found this. I'm guessing this, or something like it, is what OP meant.
Looks like it's basically a bag with something like this built into it. Interesting, I'd probably just get the separate charger and put it in whatever bag I already have.
I use a Powerbag for my MPB 13" Retina - https://www.amazon.com/Powerbag-Messenger-Charging-Smartphones-RFAP-0080F/dp/B005J4O864
In the end though, considering how thin the macbooks are, any bag with some proper padding should be fine since you'll have plenty of extra space.