Mine came without lables as well and the beam look like a small thin line at far distances.
I owned LPMs so I was able to check my power. I was given a 1.2W at peak and 1.1W on average.
There is no polarity indications on my Spartan as well but there is a spring, so you know that end belongs to the negative point. Simply put, the negative goes in first, positive face outwards.
I can burn a match at point black well almost immediately within a second. It can burn a black trash bag well at close range. It can burn newspaper at close range. It can also pop black balloons at up to 30cm away.
Initally my Laser went dead and I thought it as a problem with a damage diode. I sent back my unit and I was later told that it was working fine. I can see you have a brand new unit, not sure if you will encounter the same problem as I do, but advise from Dragon Lasers that do at least charge and discharge your batteries like 4-5 times before use before your Spartan will achieve full potential.
Aha, so your Spartan turned out fine in the end?
Glad to hear it
DL have a well earned reputation.
As for the cause apparently being to do with the batteries, this is common.
Some other users reported that run-times were pretty poor with the recommended LiFePO4 CR123A's when they are brand new, and yes, they improved a lot after a few recharges.