Instrumenting battery-drain analysis to ensure system availability

November 15, 2016 // By Graham Prophet
Keysight Technologies has an integrated solution for accurate battery-drain analysis and for managing wide dynamic-current-range requirements ; its offering, the company says, gives design engineers accurate, power use testing information, for energy, automotive, and medical industry devices.

Accurate measurements assist with maximizing battery run-time and minimizing power failures in critical for devices used in energy, automotive and medical applications; engineers can also verify that device software downloads will not impact the battery life or product performance over time.


Keysight has built its integrated solution for battery-drain analysis around several of its hardware measurement components, including a DC power analyzer modular mainframe, 2-quadrant source-measure unit, and control-and-analysis software. Specifically, the N6781A 2-quadrant source/measure unit for battery drain analysis; the N6785A source/measure unit for battery drain analysis; and the N6705B DC power analyzer. The combination Keysight adds, provides the required testing information required to manage wide dynamic-current-range devices.


Mobile, battery-powered devices often transition between sleep current, idle current pulses and active current pulses when in full transmit mode. Measuring low current and pulsing current with fast rise and fall times over a wide dynamic range is difficult. Previous available tools failed to provide accurate measurements when the current signal rapidly changes and the current varies depending on what tasks the device and sub-circuit is performing.




A video, “Keysight Battery Drain Analysis with Seamless Measurement Ranging,” which describes the device impact of power usage, is available at