Facebook Reviews, Building Better Batteries, Small Business Saturday:

Facebook (FB) recently rolled out a feature letting users review local businesses with a star-rating system, Joshua Sophy writes. [Small Business Trends]

Advice on how to start a co-op from Lindsay Van Thoen. [Freelancers Union]
Tech startups are still racing to build a better electric car battery, Lauren Sommer reports. [NPR]
Robert O’Harrow Jr.’s investigation into big small business contractors continues. [Washington Post]
Watch: A Rockford, Ill., retailer is opening her shop to host other small businesses without brick-and-mortar stores on Small Business Saturday (video). [WREX]