Since moving away from manufacturing clones, Ehpro have been knocking out some really good stuff as of late, such as the Epoch D1 tank and a range of interesting rebuildable dripping atomisers. 
The eTank S2 is the ‘sister’ tank to the original Ehpro eTank S1 sub ohm tank, marketed at those chasing flavour more than clouds, and also including an option of using Ni200 coils in order to be compatible with temperature controlled box mods.
The eTank S2 sports a top filling design, 5ml capacity, pretty large airflow and an interesting ‘gravity mechanics’ principle used to reduce leakage issues. Sounds pretty cool, so lets have a look!
In The Box
- 1x Ehpro eTank S2 with 0.2ohm Ni200 temperature control coil fitted
- 1x Replacement 0.5ohm coil
- 1x Instruction manual
There’s nothing here to tell you whether the coils are kanthal or Ni200, I had to do a quick check online beforehand to double check. That’s really poor from Ehpro, basic information like that should be included on the box as well as in the instruction manual.
Build Quality, Features & Looks
It feels like a really well made tank, solidly built and the pyrex tank section is pretty thick, surviving more that one impact on the floor from height! You have a wide bore pyrex drip tip included which is really nice looking and also helps improve on flavour as you don’t get the metallic taste that you experience from a stainless steel drip tip. 
All sections of the Ehpro eTank S2 disassemble easily so you can clean the tank thoroughly.
Tank capacity is 5ml, which is good as that should last you the majority of the day when out and about, and whilst I have used the eTank S2 it doesn’t seem particularly thirsty compared to other tanks out there. 
Filling is done through a top filling system, the top cap screws off quickly and easily, and you have some huge juice fill holes. Airflow is controlled through a smooth airflow control ring on the side of the tank.
Coils are easy to swap out as the coils don’t need to screw into the base, you simply slot them in, but you need to ensure you have an empty tank otherwise you will lose all of your juice!
Ehpro Etank S2 Key Features
- 5ml capacity
- Top filling
- Easy coil swap system
- Airflow control ring with various airflow options
- Recommended to be used from 5 watts to 50 watts
- Copper positive pin for better conductivity
- 510 threaded
- Pyrex wide bore drip tip included
- 22mm width
- 54mm height
- Uses surface tension and gravity mechanics to reduce leakage
- All sections come apart for easy cleaning
Airflow
Airflow is really generous on the Ehpro eTank S2, controlled via a smooth airflow control ring, you have a wide cyclops airflow slot. You can blow some decent clouds with this tank with the airflow wide open, it’s pretty airy!
How Does The Ehpro eTank S2 Perform?
The Ehpro eTank S2 comes with two coils, a 0.5ohm kanthal coil for regular variable wattage use and a 0.2ohm Ni200 coil. I’ve experienced issues wicking juice with a VG content above 60%, basically the tank has really struggled to keep up when using a juice with a high VG content resulting in dry hits or a dry coil warning on my mod when using the Ni200 coil. 
Also, I get leaks through the base of the tank, not heavy leaking but there seems to be juice weeping from the bottom of the tank quite frequently. I will go through the performance of both coils below-
0.5ohm Kanthal Coil
On first impressions, the performance of the 0.5ohm coil was pretty good. After priming the coil with a few drips of juice and letting the tank stand with a full tank of juice for an hour I got decent flavour at 25-30w and the cloud production was really good.
Unfortunately after around an hour dry hits began to creep in, around every 7-10 puffs I took on the tank, and decreasing the wattage was not making any difference.
I swapped the 60/40 juice I was using for a 50/50 juice and things didn’t get any better. I’ve checked that the juice flow holes are unobstructed as well, but unfortunately I get dry hits so frequently from this coil that I haven’t been able to use it any further!
0.2ohm Ni200 Coil
Things got much better when using the 0.2ohm Ni200 coil in temperature control, although it did take my mod a fair while to obtain a correct resistance reading for the coil despite both tank and mod both being at room temperature.
Testing it on a number of different mods gave the same result- the coil was being read at over 0.35ohm when it is supposed to be 0.2ohm. I found giving the coil a very quick fire enabled me to obtain a resistance reading of between 0.21-0.23ohm which is what I would expect it to be.
Flavour was much improved, I found the sweet spot to be 27w with this coil and 210c, but still nothing special. Cloud production was good offering better than average clouds. The Ni200 coil did struggle to wick above 60% VG, using a couple of different 70% VG juices resulted in numerous dry coil warnings on my mod despite there being plenty of juice in the tank.
Final Review Verdict
I can’t say I was greatly impressed with the Ehpro eTank S2 to be honest, I did expect far more from it in terms of performance, it’s by no means a bad tank but it’s not a great one either. I found the flavour to be really average with both coils but the vapour production on the other side was pretty good.
I was really disappointed with the performance of the 0.5ohm coil and the amount of dry hits I experienced even when using 50/50 juice made me think I may have had a duff coil supplied. Also, struggling to wick juice with a VG content higher than 60% is a bit of a no no these days!
The Ehpro eTank S2 is a good looking sub ohm tank, with a great AFC system, the top fill works really well and it’s easy to swap coils with an empty tank, but unfortunately I do believe those coils let down what could be a really good sub ohm and temperature control tank.
The Good
- Large airflow, blows some pretty nice clouds for a flavour chasing tank!
- Wide pyrex drip tip included
- 5ml capacity is ideal for out and about usage
- AFC ring is easy to use
- Coils are pretty easy to swap as long as you don’t have juice in the tank
- Top filling system is quick and easy to use
The Not So Good
- Flavour I found to be quite average
- I get leaks out of the base of the tank quite frequently
- Coils seemed to struggle to wick juice with a VG content of above 60%
- If you need to change a coil with juice in the tank, be prepared to lose the whole tankful of juice…
- Minimal instructions on the box, nothing stating whether the coils are made from Ni200 or not. I had to check online as to whether the 0.2ohm coil was Ni200 or Kanthal
- Had fairly frequent dry hits with the 0.5ohm coil which really put me off using that coil
