On Mon, 20 Nov 2017 04:50:57 -1000, John Keiser
wrote:

These are handy devices to measure the working capacity of the charger:
https://www.ebay.com/sch/sis.html?_n...53.m2749.l2658

The cheapest ones have worked fine for me.

I have a few of those and use them for testing chargers and phones.
Very handy. They're especially fun when I connect them all in series
and notice that both the voltage and current readings are not even
close to each other. If you're using one for measurements, rather
than just fault finding, I suggest you make a calibration chart.

I also bought a USB adjustable load:
https://www.ebay.com/itm/282437868849
which is useful for testing if a charger can actually deliver the
current printed on the label. Most will not or go into oscillation at
the rated current. It's not the best quality instrument, but it works
for the purpose intended.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558