The RCLR compact line remover from Rapala is a strong little battery-powered line stripper. This handheld tool works with braided line and mono, removing 6 feet of line per second. Power is provided by 2 AA batteries, not included.
While this line remover works for line up to 100lbs test, it is best suited for lighter stuff. It's a great option for King or White Marlin set-ups. You can use it with bigger reels like 50s, but you'll want to give the remover a little jump start to get the action started.