Smartphone batteries seem to degrade far too quickly. Part of that problem stems from our charging habits. Liion Power's new adapter micro-manages device charging, making it easy to take better care of the batteries in almost any USB-charged device, including your phone.
“Depending on the scenario, we saw up to 63 percent improvement in battery lifespan,” Stammeshaus said. “We generally say ‘up to 50 percent’ because it’s easier to communicate, but the data is clear.”
That was my first thought - but maybe this does a better job? Plus it can apparently be used for any device, so it might prolong the life of, say, noise-canceling headphones, book lights, and portable speakers.