1) This is a portable charging battery with a capacity of 3.2 Ah, enough to recharge at least once even greedier smartphones (2.8 Ah for iPhone6 or Samsung S5). It is advisable to charge the battery when the level indicator is 2 (2 blue LEDs lit). The iSmart RavPower + technology optimizes the time to charge your devices. The gain in time can vary from 1/2 to 1:30 depending on the device to be charged.
The RP-PB28 has two USB connectors for charging the battery, which is a mini-A connector and one Type-A, identical to those found on a PC, and which loads smartphone, tablet ... to double their backup time.
A USB cable for charging the battery is provided. A charge level indicator with four blue LEDs is placed on the side of the battery and is activated at the touch of the pushbutton located next door (see photo).
2) It is also a UV light source that allows you to detect counterfeits more easily:
There are different types of markers sensitive to UV radiation, especially depending on the ticket type. See attached link for consultation:
[...] ADDITIONAL / THE-NEW TICKET-OF-5-EURO / Properties-in-a-lamp UV-single-sided
Anyway, on most tickets are emerging small fibers in UV light and are invisible to the naked eye.
Other applications are also possible, for example using fluorescent ink to UV markers.
The emitted UV spectrum seems quite broad and can even distinguish organic trace on flat surfaces.
Finally, as can be seen from the photos the rigid black plastic shell is a beautiful aesthetic, while rounded.
We distinguish adjacent connectors, what appears to be a system for passing the wire tie a strap which is unfortunately not provided.
