NiMH batteries have two distinct advantages over the lithium-ion batteries more commonly used for plug-in vehicles. NiMH batteries degrade at a slower rate, and, while they're heavier, they're also less likely to leak in the event of an accident.
Meantime, Robert Bosch GmbH Chairman Volkmar Denner is giving green-car advocates a little more hope by estimating that about 15 percent of new cars will have some sort of powertrain electrification by 2025, according to Hybrid Cars. Part of the reason is that batteries will be developed to quadruple their energy density per dollar. SUVs represent a sector where powertrain electrification is about to become far more prevalent, he said.