How do the 25,000-mile duty cycle findings above contrast to the longer battery life reported by, for example, Toyota Prius owners?
The Toyota Prius hybrid uses nickel metal hybride batteries, not lithium ion. Demand on the batteries in the Prius is kept low because acceleration is provided by the gasoline engine. Nickel metal hydride Prius hybrids and aftermarket plug-in conversions of the Prius can be driven only a few miles in all electric mode and cannot operate over 34 miles per hour in all electric mode. AFS Trinity technology makes it practical to use higher energy density, off-the-shelf lithium ion batteries and to achieve longer all-electric range and much longer battery life.
