Testing of battery life on flagship phones, including iPhone XS and Pixel 3, shows newer phones die faster than older ones, likely due to screen tech like OLED (Geoffrey A. Fowler/Washington Post)

Geoffrey A. Fowler / Washington Post:
Testing of battery life on flagship phones, including iPhone XS and Pixel 3, shows newer phones die faster than older ones, likely due to screen tech like OLED  —  Despite some notable exceptions, many 2018 smartphone batteries can't keep up.  Here's why — and what we can do about it.