It's powered by four D batteries, but also an AC adapter so no worries with dying batteries. (whatbabyneedslist.com)
Perhaps the biggest benefit of a smart smoke detector: No more hunting down midnight chirps, since you'll also get phone - based notifications about dying batteries. (techhive.com)
It's cold outside, so pull up that weird fireplace movie they have on Netflix, huddle over your phone's dying battery for heat, and listen to the soothing strains of the Empire Podcast. (empireonline.com)