Mod Reviews

EHPro Mod 101 and 101D RDA

The new Mod 101 from EHPRO is a 22mm tube shaped device which offers a maximum output of 50 Watts and can be used in either Variable Wattage, Temperature Control or Bypass mode. The device supports all popular wire types in Temperature Control including Titanium, Nickel and Stainless Steel 316. Designed to use either an 18650, 18500 or 18350 battery the Mod 101 is certainly flexible.

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EHPro Mod 101 and 101D RDA

I am sure that most of you are familiar with Chinese manufacturer EHPro who mainly tend to produce quality tanks such as the Billow and Batchelor. This time they have turned their attention to a tube style regulated device and in some respects it seems like things have gone full circle back to the early days of vaping.

The new Mod 101 is a 22mm tube shaped device which offers a maximum output of 50 Watts and can be used in either Variable Wattage, Temperature Control or Bypass mode. The device supports all popular wire types in Temperature Control including Titanium, Nickel and Stainless Steel 316. Designed to use either an 18650, 18500 or 18350 battery the Mod 101 is certainly flexible. This device can either be purchased on its own or as part of a package which includes the EHPro 101D single coil RDA.

While in some respects it might seem like this is the new Vamo of 2017 let’s not draw any conclusions until we have taken a good look at what it has to offer!

EHPro Mod 101 features

  • Working Modes: Variable Wattage/Temperature Control/Bypass
  • Stainless Steel Construction
  • 22mm Diameter
  • Spring-Loaded 510 Pin
  • Wattage: 5-50W
  • Supported Battery Types: 18350/18500/18650
  • Resistance Range: 0.1-3.00ohm
  • Output Voltage: 0.5-8V
  • 0.49 Inch OLED Display
  • Supported Wire Types in Temperature Control: Titanium/Nickel/Stainless Steel 316
  • Temperature Range: 100-300°C/ 200-600°F

What’s in the box?

  • 1x EHPro Mod 101
  • User Manual

EHPro 101D RDA features

  • 22mm Diameter
  • Stainless Steel Construction
  • Adjustable Top Airflow
  • Two Post Deck
  • Single Coil Only

EHPro 101D RDA box contents

  • 1x EHPro 101D RDA
  • 1x Delrin Drip Tip (Pre-Fitted)
  • 1x Screwdriver
  • Organic Cotton
  • Spare O-Rings
  • 2x Spare Screws
  • User Manual

EHPro Mod 101 styling and build quality

I must admit when I first opened the box the first thought that immediately sprang to mind was “Ah EHPro, I see you have constructed a new lightsaber”. Joking aside this device is huge and highly reminiscent of the old Vamo that I once owned. It actually dwarfs all the mechanical mods that I own so it certainly is not going to appeal to anyone who appreciates highly discrete and lightweight devices. Of course there may be people out there who prefer these larger and weightier devices and I suspect it might be absolutely ideal if you are going through a mid-life vaping crisis and you need a big hefty mod to make yourself feel more like a real vaper! One things for sure you will certainly get yourself noticed using this beastly device and it is not something you can easily fit into your pocket.

Constructed from Stainless Steel the Mod 101 is very solid so should last you a decent amount of time but by the same token it is also somewhat heavy when fitted with an 18650 battery. The diameter of the device is 22mm so anything larger will have noticeable overhang though to be honest you can get away with 23mm atomizers since I thought that my Taifun GT III looked pretty smart attached to it. The 510 pin is spring-loaded and looks to be made from brass. The pin has a decent amount of travel to it and a nice firmness. I had no problems getting any of my atomizers to sit flush but some of the taller ones did tend to look quite ridiculous when fitted and this also leads to the issue of the device feeling rather unwieldy and off balance when held.

You can of course remove sections of the tube which actually unscrew (the seams are almost unnoticeable) and this allows you to use either an 18500 or 18350 battery in the device. Now I don’t own any 18500 batteries but I do have plenty of 18350s and I did find even in 18350 mode the Mod 101 still felt overly large to me and was still roughly the size of a standard 18650 mechanical mod. I think it’s fair to say that even if in its most compact mode the Mod 101 is not at all stealthy because the tube has to be longer to house the various electronics. One definite positive factor is that when either using 18650 or 18350 batteries I never encountered any battery rattle at all. Inserting and removing batteries is simple and the battery compartment cap in the base is easy to turn and has good threading. Some ventilation is also provided via four small holes in the cap.

The device features a single fire button which is very responsive but the fitting has a slight amount of rattle to it and ideally I think it would have been nicer if the manufacturer had made if flusher so it did not stick out as much. Another thing that makes it feel a bit off to me is that the OLED screen is on the opposite side of the tube. Now the screen itself while small is nicely recessed and bright and clear. A variety of information is displayed including Resistance, Wattage, Coil Type and Battery life. In addition the current temperature is also displayed when the device is in that mode. 

EHPro 101D RDA styling and build quality

As I mentioned earlier should you wish to you can purchase this RDA as a package along with the Mod 101. The 101D is a 22mm single coil only RDA constructed entirely from Stainless Steel. The well is fairly deep and there is a fairly reasonable amount of space for most typical coil types but I would be wary of using thicker Clapton coils because they may catch on the upper part of the barrel which features the airflow adjustment. The 510 pin appears to be made of brass and even though it looks to be adjustable it is unfortunately not the case because you will just end up loosening the post assembly.

The included drip tip is made from Delrin and is of the tapered wide bore variety. It was a bit stiff to remove initially but it has got better over time. To be honest apart from making it a little easier to drip juice into the RDA it is quite pointless actually removing the drip tip because you cannot replace it with one from your collection and there is no 510 drip tip adapter included.

The deck is something of throwback to an earlier age of vaping since it features a two post arrangement that requires you to trap your coil legs under the heads of the Philips screws. To be honest if you are used to atomizers that have this post style such as the Siren GTA or the Taifun GT III then you won’t find it a problem but if you like your RDA’s with Velocity style decks that make life extra easy for you then you may be a little irritated.

EHPro 101D RDA airflow

This RDA has two airflow slots and the air comes in through them and is then directed downward at the coil. One really nice thing about it is that the airflow can be shut down by turning the barrel counter clockwise and to open it up you simply turn the barrel clockwise.

The airflow is a bit limited in terms of its flexibility because it is either opened or closed and when open the draw offers a restrictive lung inhale and nothing more or less, so you’ll either like it or you won’t!

Given that the airflow is right at the top of the barrel it is pretty difficult to make this RDA leak even when overfilling so that’s a definite plus point!

Ease of use

The Mod 101 is designed to be very straightforward to use and everything is done using the device’s only button. Most functions tend to round robin and this can make things a little long-winded when you accidentally go past your desired Wattage and can’t just click an adjustment button. You also have to wait a short time after selecting certain options and this does give the device something of an old fashioned feel when compared to a lot of newer mods.

Nevertheless given time you will probably get used to it but that only really applies if you are used to other devices. The manual is very thorough and covers all of the various features so it would be quite pointless rehashing that information here. If you are a new vaper I think you will get to grips with this device quickly.

The 101D dripper is very straightforward to use but I am sure there will be some people out there that really hate the lack of post holes. It is actually very easy to trap the wire under the screws but if this is your first RDA you may find it a little awkward. One thing you do need to be mindful of is to make sure that the coil has sufficient clearance or it may come into contact with the airflow control and cause a short. You also need to make sure the top cap is fitted correctly (it will only snap into place one way)

EHPro Mod 101 performance

While it might be easy to overlook this device due to its rather large size I have to say that in terms of performance I couldn’t fault it at all!

In Variable Wattage mode everything works exactly how you would expect and as long as you don’t require more than 50 Watts this device offers a solid vape. I actually used my Taifun GT III vaping at 16.5W and I encountered no problems at all and the Mod 101 compared extremely well to all of my favourite devices. I then moved on to using some of my other tanks and each one vaped flawlessly!

To test Temperature Control for Nickel coils I used my Sense Herakles which is currently fitted with a Ni200 coil. I set the temperature to my preferred 240°C and the Mod 101 had absolutely no problem in effortlessly delivering a quality vape. The amount of heat was exactly right and I did not have to set the Wattage since the device tends to calibrate what power is needed for a given temperature.

I then tried the Uwell Crown Mini (fitted with a Stainless Steel coil) in Temperature Control Stainless Steel 316 and once again it was a top notch vape with plenty of heat. Battery life was respectable and quite typical of a single 18650 but it will depend a lot on what Wattage you choose to vape at. Keep in mind that you do have to charge batteries externally since the Mod 101 does not feature a Micro USB port.

101D RDA performance

I fitted the RDA with a 26 gauge Kanthal coil that had a final Resistance of 0.7ohm. I then proceeded to wick the coil with some Japanese Cotton. I found I had to tweak the coil position slightly because it kept catching on the top cap when fitted. Raiding my juice collection for something suitable I decided to make use of some Manabush Omusa and primed the wick and filled up the well.

Taking my first vape at 25 Watts I would have to say that flavour is pretty average and is neither amazing nor poor. The slightly restrictive lung inhale draw is reasonably nice but I personally prefer something more airy these days so I suspect it won’t be for everyone. Cloud production was actually quite impressive even when using 50/50 E-Liquid and for its small size the 101D puts out some generous little plumes.

One thing I really did like about this RDA is that due to the airflow being at the top you can just drip juice straight through the drip tip and you don’t have to worry about it leaking. 


The Mod 101 is a large and somewhat unwieldy tube device and realistically that is probably its only main drawback since a lot of people now prefer smaller compact boxy devices. In some ways this device makes you feel like things have gone back to basics and perhaps for some of you out there this might actually be a bad thing at all and it will might even be welcome if you are very new to vaping.

For me personally I have to say I prefer my existing devices to this and if I really wanted to use a tube mod I have plenty of mechs I could happily use that are way smaller and feel much nicer in the hand than the overly large Mod 101. However that is just one opinion and what I will say is that even though this device wouldn’t be on my particular vape gear shopping list it really does deliver the goods in terms of its absolutely solid performance both in Variable Wattage and Temperature Control and will not disappoint you in that respect.

As for the 101D RDA is a decent little dripper with a post arrangement that feels perhaps just a touch old fashioned. Now while this RDA won’t blow your mind in terms of flavour it is pretty simple to get to grips with and I think that if this is your first dripper you might really enjoy it until you get around to trying something better. As such it may even be worthwhile getting it along with the Mod 101 if you fancy getting into rebuildables and you want to save yourself a bit of money by making your own coils. For anyone else who likes drippers I don’t think there is anything on offer here that you haven’t seen done better already.

At the end of the day despite its size I feel the Mod 101 is well worth picking up providing it appeals to you. The 101D is certainly less appealing but might be worth a look if you get as part of an attractive deal or you are someone who really wants to try out an RDA for the first time!

Many thanks to EHPro who sent the Mod 101 and 101D RDA to Planet of the Vapes for us to review. If you would like to purchase either of them they are now being stocked by a variety of UK retailers.

Thanks to the guys at EHPRO we have two of these kits to give away - you can enter the competition here

VapeMaster avatar


Reviewer at POTV
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