TL;DR: Charging your smartphone overnight isn’t inherently bad, but long hours at 100% and heat accelerate ageing. Prefer slower charging, a cool environment, and Optimized/Adaptive Charging. Table of contents How is battery lifespan determined? Why do lithium-ion batteries lose capacity? How to “take care of” my smartphone battery Can I use apps while my phone … Continue reading Why is charging your smartphone overnight is a bad idea