EHPRO Cold Steel 100

1. GENERAL IMPRESSION.

First impression: Hmm, weird...
Second impression: SOOOOLID

Yes, this strange "hump" with electronics placed on a tube is not very ergonomic so I strongly recommend to take the Ehpro in your hand before buying. All the rest is FINE: rock solid finish and heavy weight (240 g with 21700 battery), it's one of the heaviest one-batt mods. Fire button is not so big but works 100/100, up/down buttons too. Top and bottom:

Nice and solid. Battery bay and cap allow to use even a little oversized battery (e.g. black Shockli 4550).

Display is VERY small, but sharp and quite readable:

Menu system is very quick and responsive.


2. FEATURES.

* power: 120W,
* resistance range: 0.05 - 3 ohm
* modes: VW, Temp, BYPASS, V, CURVE
* battery: 1 x 21700/20700/18650 (18650 with included adapter),
* weight (with battery): 240 g,
* dimensions: 92 x 39 x 28 mm.


3. VW mode.

Voltage shape at 30 W:

PERFECT.
Preheats:

are very small, only a few percent. Fortunately, there is the CURVE mode:

Which is quite original. The intervals are very short and last only 0.125 s, fortunately there are 20 of them, so the total time in which we can control the power is 2.5 seconds. BRILLIANT is that we do not set the power in an absolute way (in Watts) but relatively as a multiplier of the current power setting. So all you need to change the whole power curve is to change main power setting. Nice! Only this voltage peak at the beginning is worrying - it gives much larger power than set which can result in "shooting coil".

Performance:

Perfectly up to 100 W, then restrictions start to work. Anyway, VERY GOOD as for one-batt mod.

Ehpro also has an old-school mode "V" in which we can set VOLTAGE on the coil - it works very precisely:

4. TC mode (SS316).

Dry wick:

The chip quickly realizes that something is wrong and drops voltage below 0.5 s. So the wick gets bronze only a little:

Slightly moist wick (third puff after soaking):

The regulation is quite smooth, with no modulation (as for dry wick).


5. CONCLUSION.

A bit weird in using but very solid mod.

What I LIKE?
* responsive menu system,
* solid build.

What I DISLIKE?
* ergonomy is ... weird.