The sony bp u90 is a rechargeable lithium ion battery with intelligent power management for use in a diverse range of sony camcorders including the pmw ex1 pmw ex3 pmw ex1r pmw f3k pmw f3l pmw 100 pmw 200 pmw 150 pmw 300k1 pmw 300k2 pxw x180 pxw x160 pxw fs7 pxw fs7k pxw x200 and pmw 50