During Deep Sleep, microcontrollers consume very low currents, and batteries live longer. Unfortunately is not easy to measure these small currents. Today we will check out two small boxes which promise to make this possible. And we will use the 10'000$ professional Keysight N6705C Power Analyzer to establish the reference.

The first contender is the well known µCurrent Gold which is made by Dave Jones from EEVblog. It is the "mother" of this device category and costs around 80$.
The other is called Current Ranger and is built by Felix Rusu from Low Power Lab. It just entered the market and is an extension of Dave's concept and costs around 120$.
And we will use an ESP32 to check it out.

Links:
µCurrent Gold: https://www.eevblog.com/product/ucurr...
Current Ranger: https://lowpowerlab.com/guide/current...
Keysight N6705C: https://www.keysight.com/en/pd-274785...
Keysight Partner: https://www.ccontrols.net
USB isolator: http://s.click.aliexpress.com/e/cePppVMk

Supporting Material and Blog Page: http://www.sensorsiot.org
Github: https://www.github.com/sensorsiot

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