Stanford technology predicts the slow death of lithium-ion batteries

Batteries fade as they age, slowly losing power and storage capacity. As in people, aging plays out differently from one battery to another, and it's next to impossible to measure or model all of the interacting mechanisms that contribute to decline. As a result, most of the systems used to manage charge levels wisely and to estimate driving range in electric cars are nearly blind to changes in the battery's internal workings. Instead, they operate more like a doctor prescribing treatment without knowing the state of a patient's heart and lungs, and the particular ways that environment, lifestyle, stress and luck have ravaged or spared them. If you've kept a laptop or phone for enough years, you may have seen where this leads firsthand: Estimates of remaining battery life tend…
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