Battery testing too, at DxOMark...
(All About Windows Phone)

Despite misgivings from the past over DxOMark`s phone camera testing (bias towards companies that paid for collaboration, bias against Windows phones), it has to be said that their expansion into audio and now battery testing is pretty impressive. So maybe it`s time we were more open to their ongoing smartphone rankings? I`ve linked below to their introduction to how they test phone batteries and charging systems. Their tests won`t be that restrospective, not least because old phones will have old batteries, but at least we`ll get some semi-definitive ratings for new phones as they launch.