10
Troubleshooting
LEDs are not coming on
Please ensure and check the following:
1. Is the 18650 cell inserted the correct way around?
Obvious we know, but it is a learning curve with many not totally
familiar with 18650 nuances. The positive end of the 18650 cell
must face the LED head. So, with button-top cells the button
end faces the LED head, meaning that the other negative end faces
the tail cap end. We have definitely encountered this issue on many
occasions - it's a very quick fix and an even quicker check to make
sure this isn't the reason why the V3 won't turn on.
2. Is the 18650 cell fully charged?
Again, an obvious thing to some, but again it's an 18650 learning
curve thing. Either check that the cell is fully charged to 4.2 volts
or failing that ensure that the charge indicator on the flashlight has
changed color.
3. Have you removed the battery insulation disc?
For transportation you’ll notice a thin white disc covering the end
of the cell (between the cell and the inside tail cap) – sometimes
it can get affixed to the inside tail cap. Please discard this, as its
only function is to prevent parasitic drain and circuit connection
during transit. (Also, please note that the Li-ion cell will arrive semi-
charged, but may need further charging). So on first start it's always
best to fully charge the cell otherwise you may think the unit is
defective. For future reference, the positive end of the cell is
inserted first into the barrel i.e. the positive end is facing the LED
head while the negative end faces the tail cap).
4. Checked all of the above but still the V3 will not turn on.
Do ensure you've carried out the previous checks - as we've found
that in most cases these resolve. In some rare cases, the cell
supplied will need to be charged again. The PCB protection inside
the cell sometimes (in rare cases) needs another charge cycle
attempt to "wake up" the cell.
Please check out our Help Center & Knowledge Base on our
official website here:
https://uvbeast.com/apps/help-center
Otherwise, please contact us on our site and we'll resolve ASAP.
