I use the bars to judge expected total battery life. (newscientist.com)
Mophie claims 27 hours of total battery life from the iPhone 7 Juice Pack Air, or up to 33 hours from the iPhone 7 Plus version. (slashgear.com)
A rugged Windows 8 tablet, the Xplore Bobcat is a rough and tumble device that's not only ready to go into the nastiest environments, it will also last longer thanks to a long lasting battery and hot - swappable secondary battery that stretches total battery life to 10 hours. (pcmag.com)