My at and t phone died
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That process can wreck the performance and life of a battery. Instead, they exit the solution and plate across the surface of the graphite as solid lithium. When the battery is frozen, though, the ions don't enter the graphite. Under normal conditions, applying an electric current to the battery would transport ions back into the pores in the anode's graphite. Harris wrote on his website, the lithium-ion charging process can fail horribly. Under very cold temperatures, as Lawrence Berkeley National Laboratory chemist Stephen J. The phone interpreted that weak discharge as a sign that the battery was nearly dead, and shut itself off shortly afterward.įortunately, I didn't attempt to recharge my battery while the phone was still frozen. in biomedical sciences and has taught chemistry at various academic levels, wrote in 2017 on. But because the bitter cold had slowed or stopped the reaction inside the battery, it discharged less current than the phone needed to keep working, chemist Anne Marie Helmenstine, who has a Ph.D.
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In fact, cold temperatures prevent the kind of slow discharge battery ions do under room temperatures, as the engineering website explains. When my phone's charge meter read "1%" on that platform, all of the ions hadn't suddenly jumped to the cathode. "The exact mechanisms leading to poor performance of lithium-ion batteries at cold temperatures are still not well understood," a team of battery engineers wrote in a paper in the Journal of The Electrochemical Society in 2011.īut it's broadly true that extreme cold slows the reactions in batteries of all types to a crawl. Chemists don't have a good idea of exactly how cold slows the reactions that take place inside lithium-ion batteries.