Disposal of hybrid batteries does not pose an environmental issue, said James Kliesch. Research Associate for ACEEE, so battery disposal doesn't figure into the score..
"It's generally agreed by the experts that batteres in [non plug-in] hybrids are going to last the life of the vehicle," he said
When the vehicle is eventually disposed of, the battery will almost certainly be recycled because of the high value of the nickel it contains, he said.