I was not disappointed! The Power Bank invites my, but admittedly somewhat in Older SGS II without problems. The 2000 mAh battery of the SGS II can with the Power Bank invite approximately 1.5 times, which is more than enough even for a longer cache. (To have as my other Powerbank of RAVPower without pressing a button starts directly to the store, I thought at first caught a defective power bank) This one should note that the Power Bank button must be pressed again before charging starts.
The UV light is really great and does not consume significant power. It is either activated by pressing twice the single button on the Power Bank, or by pressing and holding it for about 2-3 seconds. Disabling functions identically! At night you can do with the black light fluorescent labels for several meters locate or possibly lost items which for example are marked with fluorescent paracord etc., easily found (see screenshots).
Conclusion:
I am absolutely satisfied with the product and can highly recommend! The Power Bank works perfectly and the black light works for many weeks and several caches as the day!