Long Term Solar Lighting Test, Part 2

In my exciting previous thread,
https://permies.com/t/169620/Long-Term-Solar-Lighting-Test#1336129
I laid out my thoughts on these lights and potential issues (i.e., the solar panel is too small) and how I planned on fixing that. Keep in mind that these solar lights can also be charged via USB.

These lights are remote controlled, can come on automatically, be turned on manually, have a dimmer, have a timer for 2,4 and 6 hours. I also use these lights indoors for nighttime lighting.

After more discussion with the distributor, Richarm, out of Jamaica, N.Y., the point of which is that they apparently had a batch of bad lithium-ion batteries. I intend to take apart the two offending lights and replace the batteries myself.

To aid me with that, Richarm sent me a new set of lights, two 15 foot USB charge cables and 4 short USB charge cables, all gratis. These 2 lights I'll be doing my first fast charging testing on. The thing is with these solar outdoor lights - and these are the best one's I've ever owned - one of two things always happens.

1. They don't charge fully because of undersized solar panels (doesn't matter what style or brand).
2. They do not stay lit from dusk to dawn (especially in the winter).

These Richarm lights have that issue solved - they are able to stay on all night, even in the winter. It's the charging where the hangup is. Unless it's total sun, they won't fully charge and so don't stay on all night.

So I have the new lights and started testing them last night. So far, they've been on for an astounding 12 hours. That's right, solar outdoor lights on for 12 + hours.

I've ordered a 25 watt folding USB solar panel that will be my first test in a shorter charging time. That test will start on 11/30/21.

Aaand a quick update on the progress of the long term test.

I ordered a folding solar panel, 24 watts to test if this would charge the lights before I drag out actual panels. After 5 days in the sun it managed to charge one light.

The issue is that this outstanding bit of chicom engineering has 3 USB ports on it but it will only use one at a time. By that I mean device A will charge for 30 seconds, then device B will charge for 30 seconds.

Next up is a purpose built USB charge controller that uses normal solar panels.