I mounted the trimmers on a high-tech piece of cardboard—near a kitchen timer—and used a timelapse video recording to see when each product shut off. After seven weeks of growing and trimming my beard ...

Still, the Philips Norelco Series 7000 is the peak of swappable combs and attachments for sub-$70 beard trimmer. Braun Series 9 may have more attachments, but the Multigroom is $30 cheaper. I'll admit ...