G. David Felt Staff Writer Alternative Energy - www.CheersandGears.com     The King County Metro mass transit division has decided to work with manufacture Proterra, Inc., a Burlingame California based company in testing pure battery powered electric buses on the hills of Seattle. These buses get 23 miles per charge and recharge in 10 min. These three buses will be deployed on heavy use city routes. Metro will be evaluating the cost savings from using EV buses. This testing will take 1 year