lithium-ion batteries

Finland’s Aalto University has developed a way to revive dead lithium-ion batteries, refurbishing them for reuse with a process called "re-lithiation". It uses a process of electrolysis to rejuvenate the lithium in the battery electrodes, reversing the loss of lithium due to use. Although the re-lithiation battery would not be as good as new, it can be used for a considerable amount of time before being rendered useless.