From smartphones to electric vehicles, many of today’s most innovative products depend on lithium-ion batteries to function. That’s why every year the tech industry upgrades these portable power sources to hold more and more charge. While this allows them to create better products (at least in theory), it also leads companies to discard a lot of technically obsolete batteries that can still collect energy. For instance, the lithium-ion units that power cars and buses can be used for Continue reading →