Maximum CPU has posted its review of the HyperMac MBP-222 External MacBook battery

I love my MacBook Pro. It has the power to perform intensive computations, but has a slim and lightweight form factor that is unparalleled. The screen is gorgeous, and the keyboard and trackpad are very comfortable. Battery life is another story, and is the only sticking point I have with the platform. I can usually get 2-3 hours of light use out of it, but no more than an hour of photo editing or audio processing. HyperMacs external battery line promises to solve that problem if you're willing to tote around an external battery.

HyperMac MBP-222 External MacBook Battery Review