Guestpost:Learning by Doing How To Make an External Mac Book Battery Pack in March, 2012

You are certainly a Mac Book's user or fan , then this maybe concerns yourself : One solution is a commercially available battery pack, 

but they're not cheap. So how about making your own for $60? Over at the Verge, there's a post that explains how to hack together CCTV batteries and a third-party car charger to make a cheap external power packt aht can provide up to nine hours of juice. It's a pretty straightforward project—if you know which end of a soldering iron to hold, you should be OK—which could save you a few hundred dollars. What's not to love? [The Verge