Photos: Green tech grows in Boston

A123 Systems is one of the best known green-tech companies in the Boston area. The lithium ion battery company, spun out of MIT, makes batteries for Black & Decker tools and is angling to supply packs to auto makers and utilities for grid storage. Here is a photo of an early version of its auto battery pack, fitted for a Toyota Prius plug-in.

Photo by Martin LaMonica/CNET

Caption by Martin LaMonica