Enlarge Image Stable Ride. The performance of new lithium-air batteries is nearly unchanged after 100 charge and discharge cycles, which could bode well for their future use in electric vehicles. Credit: (car) Tony Hisgett/ Wikimedia;(graph) Adapted from Z. Peng et al., Science Researchers have long had high hopes for lithium-air batteries, a device that has the potential to store 10 times more energy than the best lithium-ion batteries on the market today. But so far, lithium-air batteries have been unstable, falling apart after a few charges. Now researchers report that they've made the first stable lithium-air batteries. If the...