I have purchased way too many of these fold-able type solar chargers. For some reason I have really enjoyed testing them. But I really shouldn’t keep them all.
NOTE: it seems all fold-able type solar chargers are WAY over rated. All of these seem to only produce about 10W in ideal conditions.
Good job with the reviews, I currently own Aukey 21W, EasyAcc 28 and a RavPower 24W.
From my testings, the RavPower 24W stands out from the crowd and performs the best, you should try it, with its three separate controllers design it’s quite unique. The only “bad” thing about it, is the fact that it can’t work if you close or completely cover any of the panels, no bypass diodes I guess, pity…
I am from Europe and this charger is available here since the beginning of summer, it’s quite interesting that RavPower still doesn’t sell it in the US, I guess your best bet is to contact them directly from their website or on amazon for more info.