yeah never leave unattended 
btw I didnāt had issues with that.
For real āstress testā on drone lipo batteries I use bunch of car headlight bulbs in different configurations thus easily going up 100-150W if needed (free and safe).
Powered my CHIP/LNA/RTL-SDR yesterday on an Astro E5 16750mAh Portable Charger which I purchased a couple of years ago to charge phones and iPads and occasionally running my Raspberry Pis. Starting from a complete charge, it shut down at slightly over 15 hoursā¦ No power passthrough though.
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Tested with 1A resistor load it does 13.8 Ah @5V, calculating back to @3.6V it does 19.1 Ah, 74Wh
What I see that every power bank maker states the ābiggest Ah numberā which corresponding to 3.6V lipo voltageā¦
A bit confusing as everyone looking for the 5V output.
I can confirm that this gizmo does passthrough charging: https://www.amazon.com/dp/B0711NSNQL/ ā itās been running my Dreamcatcher board for a few hours while Iāve shifted plugs, carried the whole thing around the house, inserted a USB ammeter in the upstream line, etc. All perfectly uninterrupted.
Down-side is that it gets pretty hot while eating 5+ watts from the charger, passing ~3 to the dreamcatcher, and storing the rest into the batteries. Hot enough to start melting the plastic caseā¦ yikes! Note to self, donāt set the thing on top of a blanket next time. It needs airflow!
I like the idea because I can use it as a charger for topping-off my 18650ās from any USB source, or use it as a power bank if I find that I have charged 18650ās and a USB device that needs powering. Bonus, the little LCD shows the current drawn from each USB-A port, though it doesnāt also show how much itās drawing through the micro-B input.
Note that the batteries are not included, so the price is actually pretty terrible unless you consider that a feature. But I figured Iād mention it here since the general style is interesting, and there are versions with varying numbers of battery slots, which might make it applicable to different applications.
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cool stuff, but overheating sounds a bit scary as LiPo chemistry is very sensitive for that (dangerouslyā¦) 
Zoltan, @zoltan Iām planning to use the Easy acc 20000mAh Portable Charger you recommended with one of my new Dreamcatchers and active antennas. I want to package the receiver in a smaller volume that will be easier to deploy.
My objective is to have a seamless transition from ac power to portable power and back again without a Dreamcatcher reboot. Ken
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