BaBylissPRO SNAPFX Trimmer FX797 w/ Snap In/Out Dual Lithium Battery System Introducing the new BaBylissPRO SNAPFX. For the first time ever, the power of UNLIMITED cordless runtime is in your hands with our patent-pending, industry-first dual battery system. Effortlessly snap in/snap out the high-capacity battery cartridges while you work. Charge one cartridge while using the other, enabling you to cut for as long as you want, client after client.