Bulatlat.com Labor group Kilusang Mayo Uno (KMU or May First Movement) yesterday asked the power distributor Meralco to stop imposing additional power rates and instead refund around P7 billion (or more than US$157m) overcharges that it had collected from over 4 million Meralco customers in 2004 and 2007. Since last month, Meralco had been imposing…