Product: Hermes 2.6v-3.5v 320 mAh battery (510 thread)

Sample unit provided by: BurnMan/PRC

Pricing: Contact BurnMan (I believe these will be available through PRC)

Photos:

Notes: This is a small but quite powerful battery with five voltage levels -2.6v, 2.8v, 3.0v, 3.2v, and 3.5v. Levels are easily changed by clicking the power button 3x within 2 seconds. Once a voltage setting is chosen, the corresponding color will light up around the button when it is pushed. Once you settle on the voltage level you prefer, just remember the color that goes with it and it's so easy to verify your favorite setting. Purple is my color -3.2v.

I tried each setting starting with the lowest (Green), which produced a minimal vape, but I would by no means call this one a cloud.
Next up was the Blue setting, or 2.8v. I wouldn't call this a billowing cloud either, but I used this setting to test the dark amber GC from PRC, and a single draw was enough to fill that magic (separate review up soon) that Green Crack delivers.
Starting with the White setting -middle of the power/heat spectrum, now we are getting a light vape cloud upon exhale.
Now, comes Purple, 3.2v of power. My sweet spot; for me, this is where it's at. Nice little cloud…probably a psychological boost for me -I like things that go boom too lol.
On the Red 3.5v, a decent vape cloud is recognized. If you want to go further than that, you would have to go into a mod pack.

I didn't feel the highest setting was necessary for me for 2 reasons. First, higher heat will use oil faster. If the oil is doing the job at the lower setting, overkill is wasteful. Unless you're a showoff. Ha! Second, in theory you could use up your charge quicker. Having said that though, the manufacturer states 400-500 puffs. I used the pen at the 3.2v setting on and off all day and part of the next without needing to recharge.

Additionally, clicking the button 2x within 2 seconds preheats the cartridge. Useful if you're going to be using the vape outside when its quite cold.

In summary, this is a pretty powerful battery for it's size and price point. Having five choices of voltage is economical and allows you to tailor your experience.