Almost a third of electric car batteries are expected be reused by 2025, providing important applications for the power grid and buildings, according to a new report from Bloomberg New Energy Finance. The report estimates that there will be 29 gigawatt hours of used batteries created by electric cars by 2025, and 10 gigawatt hours of those will be repackaged and find new life storing energy for buildings, home owners, and utilities. Ten gigawatt hours…