The battery life truly over-delivers: your mileage may vary since Philips Norelco only claims a (still impressive) six hours of charge, but I got a ridiculous 17 hours of consecutive runtime fresh out of the box, thanks to a lithium ion battery. The Multigroom 9000 is also a solid hair trimmer (shout out to that brawny motor and battery again) and body hair trimmer as well. Best Value Beard Trimmer: Philips Norelco All-in-One Multigroom 5000