4 quick software tweaks to extend your phone’s battery life by 30 percent

Modern smartphones don’t run out of juice mid-afternoon because their batteries are defective. They run out because dozens of invisible background services are constantly running full-throttle in your pocket. Apps are pinging GPS satellites, pulling fresh data over weak cellular connections, and redrawing high-resolution screens 120 times per second. If your charger’s at home on the counter, alone and forgotten, you don’t need to put your phone in a drawer or live on Low Power Mode all day.…