Description
A battery-powered device can swing from near idle to a burst of activity in moments, and battery life depends on that pattern. The Keysight N6781A source measure unit (SMU) is a two-quadrant module built for battery drain analysis. Lost in HCM lists it for rental and sale, with service on request.
How battery drain analysis works
The Keysight N6781A source measure unit stands in for the battery. It sources current while the device runs, and it sinks current when the device pushes some back. Meanwhile it measures voltage and current at the same time.
Seamless current ranging helps one measurement cover both low and high current levels. Programmable output resistance lets you approximate how a real battery behaves under load. An auxiliary voltage measurement then adds a second reading. Together, these features support detailed power analysis.
Two ranges, never both at once
| Outputs | 1 |
|---|---|
| Quadrants | 2; source and sink current |
| Output ranges | 20 V / +/-1 A or 6 V / +/-3 A |
| Maximum source power | 20 W |
| Platforms | Keysight N6700 modular power systems and N6705 DC power analyzers; verify firmware and configuration |
| Sensing | Four-wire remote sense |
Choose the 20 V range with up to 1 A, or the 6 V range with up to 3 A. A 20 V, 3 A point does not exist. So pick the range from your device first.
Jobs for the Keysight N6781A source measure unit
- Battery drain analysis, for example on wearables and sensors.
- Characterizing dynamic device current across modes.
- Automated power validation with a compatible mainframe.
- Engineering troubleshooting and wider measurement workflows.
Review the configuration before delivery
First, confirm the mainframe model, firmware, free slot and total power budget. Then check the output-disconnect relay option, the voltage and current range, and the load and sense leads. Also list the connector block, the interface and the automation software. Offers for rented and used units can vary by serial number, so ask Lost in HCM to compare like with like.
Borrow it for a study or buy it for the lab
Rental suits a single product study, while a purchase suits a lab that profiles battery life every month. Say whether new or used equipment works for you.
Send your request
SMK Vietnam lists this unit for its partner Lost in HCM, which supplies it and sets the terms. Request a quote from Lost in HCM with your range, mainframe and dates. Related units sit in the source measure unit category. Datasheets live on the Keysight website, and SMK Vietnam can pass questions along.
N6781A questions
What makes the N6781A suit battery tests?
It sources and sinks current, measures voltage and current together, and offers seamless ranging, programmable output resistance and auxiliary voltage measurement.
Can it deliver 20 V at 3 A?
No. Its ranges are 20 V with up to 1 A, or 6 V with up to 3 A, within the 20 W source rating.
Which hosts take the N6781A?
Host it in a Keysight N6700 mainframe or an N6705 DC power analyzer. However, verify the firmware and configuration first.
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