I decided to pick one of these up the other day during one of their flash sales.

Overall good light output. Seems as well made as any other olight, etc. However it has one unforgivable flaw.
Despite the fact that it states it takes 18650 batteries, these are not really 18650 batteries. They are a "customized" battery which means you can't use any standard 18650 in the light.

As far as I can tell they have some sort of sleeve under the shrink wrap of the battery. It brings the negative terminal up and around to the top of the battery in a ring so that it can contact the head of the light. I assume this was done as some sort of cost saving measure since I can think of no practical reason to make this change. I did some research and apparently they have a couple lights like this.

I would be a lot less mad about this if they disclosed it ahead of time. However the information is not available anywhere on their web site. It states that is comes with a "customized" battery but not that it won't work with standard 18650s. I find this quite deceptive. Given how cheap that light was I don't think I will return it. But I sure have less trust in them.