Spectra Precision External Power Cable for DG511 & DG711 The Spectra Precision P21 External Power Cable is a 12V DC battery cable with battery clips (alligator clips) designed for compatible Spectra Precision pipe laser systems. Built for demanding field environments, it enables reliable external power connection directly from a 12V battery source to help maintain continuous operation during extended pipe laying and alignment applications. Its rugged construction supports dependable daily use on active construction sites, making it a practical solution for contractors requiring portable external power in the field. Key Features • Compatible with Spectra Precision DG511 and DG711 pipe lasers • 12V DC battery cable with alligator clips for direct external battery connection • Provides reliable external power for extended field operation • Supports stable power transfer in demanding construction environments • Durable construction built for professional job site use