The researchers report the results of their prototype testing in the Proceedings of the National Academy of Sciences. They found that their self-heating battery could withstand 4,500 cycles of 15-minute charging at 32ºF with only a 20 percent capacity loss. This provides approximately 280,000 miles of driving and a lifetime of 12.5 years. A conventional battery tested under the same conditions lost 20 percent capacity in 50 charging cycles.
"This ubiquitous fast-charging method will also allow manufacturers to use smaller batteries that are lighter and also safer in a vehicle," said Wang.