I’m not sure about that. I tried pulling under an amp from it when set to 6v, and it promptly shut down. That’s a lot of the reason I suspect it’s a fake. I’ve heard a bunch of positive reviews about other Aili devices, both the 119 and the 4 cell USB power bank, the one that’s reviewed here: Mini-Review: USB Battery Box 4x18650 Aili (Newer Version) .
The fact that these get good reviews and the one I have does so poorly is part of what leads me to think it’s not the real thing.
On a somewhat related topic, but what’s the voltage cutoff when charging with the Aili 119? I am being very cautious, and making sure that I don’t push anything above 4.2v. I haven’t tested how far this will push cells, simply because I know that charging above 4.2 will degrade battery life, and if pushed too far is actually dangerous.