N6783A/BAT - 

The Keysight N6783A-BAT Battery Charge/Discharge Module is a basic, 2-quadrant module designed to be used by battery-powered (mobile) device designers. It is ideal for validating batteries to be used in a final design, or conditioning batteries in mobile devices via charge/discharge cycles. Its built-in, digitizing measurement system allows accurate measurements over the short and long-term. When used in the N6705B DC Power Analyzer mainframe along with the 14585A Control and Analysis software, short- and long-term measurements for battery validation are made easy. The N6783A-BAT can be used for battery charge/discharge only.
The SMU family is part of the N6700 modular power system, which consists of the N6700 low-profile mainframes for ATE and the N6705 DC power analyzer mainframe for R&D. The product family has four mainframes and over 35 DC power modules to choose from providing a complete spectrum of solutions, from R&D through design validation and manufacturing.