Hi amok and welcome. I too am in the dark....Never heard of a Little Gem Sidewinder. I can assure you tho, it does not have anything to do with the Riva 510 that you just ordered. Where was the comment?

sas
ps. Well, I was wrong....here is a link to it from Liberty-flights in the UK. Basically what it is---it is for 6Volt
vaping.....That is really strong.....Most like the 3.7 v
batteries, which I think it what the Riva 510 is. so you are ok,,,,,unless you want 6 volts. 6 Volts should split ones head in half , I would think.
Here is a link to read about it.
http://www.liberty-flights.co.uk/product.asp?id=82