Never change the batteries again in your Les Paul guitar with the Fishman Fluence rechargeable battery pack. Another benefit is that you will save money and save the planet! the universal power solution for Fishman Fluence pickups, these Lithium-ion packs require no modification of your guitar, and can also be used to power other on-board 9-volt pickups and accessories. Featuring a current capacity similar to a premium 9-volt alkaline battery, this battery pack is rechargeable via a standard mini-usb cable. The cable and charger are included in the box.