Fishman Rechargeable Battery Pack STBK, Fishman Rechargeable Battery Pack, Lithium ion power supply solution for Fishman Fluence pickups, Direct replacement for the tremolo cover on single-cut electric guitars, Does not require modification of your guitar and can be used for other on-board 9 V pickups and accessories, Has a current capacity similar to a high-quality 9 V battery, Rechargeable via a standard mini-USB cable, LED displays let you know when it is full and when it is time to charge, Full charging time: 3 Hours or less, Up to 250 hours of operation per charge when used with Fishman Fluence pickups, Connector cable, USB cable & micro USB cable included, Colour: Black, Dimensions (W x D x H) 90 x 144 x 5.8 mm, Weight: 79 g