This is a soda can light with four 18650 batteries. Tried charging on my USB C high current capable charger with voltage and current monitoring and the USB charging port is dead. Tried on another charger with the same result. Charging indicator light on the flashlight also not functional. Batteries charging OK on an external charger and arrived with about a 60% charge per the external charger. Light itself functioning correctly so far as I can determine considering that it arrived with absolutely minimal documentation. and it does seem to be a quite powerful UV light. The 18650 batteries are absolutely minimal capacity at a claimed 2000 MaH, ridiculous for this size battery. No indication on the batteries of maximum continuous current capacity either.
The bezel unscrews and the UV filter can be removed if desired. No other front glass so if the filter is removed the LEDs are exposed. This has four LEDs, each with 4 dies visible.
Needless to say I am not too impressed with the quality of the light or Alonefire’s quality assurance. Overall about the cheapest built soda can light I have seen in 10 years of purchases.
It’s one of ‘those’ brands. I have no expectations of their quality, neither will I ever buy one from them. Even for 5 bucks a pop they are not worth the price. Sorry for your loss.
1LUMEN gave several of their lights decent performance ratings in their UV flashlights review so I figured worth a try. I have multiple older soda can lights without the USB charging so used to having to remove the batteries for charging. But also a retired quality assurance engineer so I find quality issues annoying.
Turns out that there is a compatibility issue with the SV84. Charging works with a USB A to USB C cable and the USB A output of a current generation high wattage capable charger that has one but not with a C to C connection. Weird!!!
I have not run into this before though I note that the light’s circuitry only takes a charge at the USB 2.0 rate so the circuitry in the light may be too old to recognize and handshake with current USB C protocols.
The latest version of USB C chargers can charge at multiple voltages from 5V to 20V and at power levels up to 100 watts or 5 amps at 20 volts. The latest specs go even beyond that, up to 48 volts and 240 watts. The EEC has made USB C a requirement for newer rechargeable small devices I believe.