The Teslacigs Biturbo Mech kit arrived to review the other day, and while trying to get my head around why someone would release a product so similar to a 2 year old unpopular mod – anyone remember the Hell’s Gate circa early 2015? – I noticed a couple of things that offended me greatly. This article I imagine will put me in the bad books with Tesla, which is a shame because I’ve genuinely enjoyed a lot of their previous products, but, unfortunately, like most things in life, you’re only as good as your last offering – and in the case of the BITURBO MECH, it’s not promising, in fact, it’s down-right worrying.
Let’s kick off with what I’m not happy about then.
First of all, the box clearly states ‘STARTER KIT’ under the Biturbo Mech banner at the bottom of the box. Clearly, an unregulated series mod is absolutely NOT a starter kit. Strike 1.
Secondly the name, the Biturbo MECH – It’s clearly not a mechanical device, it’s got protection (to be discussed) and wire/solder, it’s UNREGULATED. I know this point is a tad picky, but still, it’s saying it’s something it’s clearly not. Strike 2.
Now this is where things get serious.
Back in 2015, a lot of us were concerned with the HG mod as mentioned above, purely because people didn’t seem to understand that if you put a 0.4Ω dual coil in one atty that’s fine, but if you put a 0.4Ω in the second atomiser as well, that is then the equivalent of a quad coil and therefore from the battery’s perspective, a 0.2Ω drain (without trying to teach you to suck eggs, doubling the coils, halves the resistance, think of drinking straws, if you double the straws you suck down more drink because there’s less resistance), and so while it was much rarer to build at the low levels people do now, it was still concerning that people were putting undue stress on the batteries without realising it. At least that particular mod had a parallel battery configuration, and so shared the amp drain amongst two cells.
We now know more, and as an industry we’ll generally suggest not building lower than a 0.4Ω coil on a series mod, because with an initial 8.4 volts of power (not including battery sag and voltage drop), you’re getting a fairly angry 174w of power with a thoroughly safe (cell dependant) 21amp draw. In reality however, we know that you will not get that full power due to the battery sagging under the load and reducing the output voltage – but this is very dependant on the cell used, as well as it’s age and condition. What you will get is incredibly difficult to approximate with any accuracy, which is why the tests from people like Battery Mooch are absolutely necessary in our desire to find the perfect vaping experience.
This brings me to my biggest issue with the Biturbo Mech, and the absolute reason why I will NOT be reviewing it in it’s current form.
Teslacigs in their infinite wisdom have decided that the minimum resistance is 0.1Ω!! and let’s get this clear, based on the full 8.4v of the battery, that’s a draw of 84amps from a series setup! (again, no egg sucking tutorial intended, but parallel batteries nearly doubles the amount of amperage they can handle while keeping voltage to the 4.2, series batteries will double the voltage but keep the amperage to the same as a single cell).
Could this be a printing error in the manual that will easily get changed? Absolutely not, the minimum resistance continues on the mod itself!
This truly appalled and angered me. At a time where we are all pushing to educate, to lead the way forward with safety and responsible vaping, Tesla are saying that it’s perfectly fine to use 0.1Ω on a series mod. Quite frankly, I was stunned.
Immediately I questioned my Tesla rep about this and while they conceded that they would remove the words ‘Starter Kit’ from the box, they see no issue with the lower resistance, insisting that the battery sag would reduce the voltage output sufficiently.
When questioned about how they decided on 0.1Ω being safe the response I got was…
“we use 40A 18650 battery, 0.2ohm resistance, use A atomizer works, the voltage around 6.21V, wattage around 176W, when use B atomizer works, the voltage around 6.04V, wattage around 166W, when two atomizer works the same time, A voltage is around 5.24V, 136W, B around 5.28V, 127W, total would be 263W”
Can anyone see what’s wrong here? With no regulation of the power, the coils are trying to pull as much as they can from the batteries, and are purely regulated by the over-stressing of those batteries and the resulting sag and voltage drop through the mod reducing the voltage amount!
Again I pressed further insisting that they are calculating incorrectly and making a statement about a product that is quite simply, unsafe. The response was…
“well we suggest lowest resistance is 0.2ohm, single one 0.1ohm. for protection battery
and about 6pcs MOS inside do protection for chipest
i mainly want say this is safety product. just confirm that we gonna remove “starter kit” on package from now on -Thank you remind us”
I pleaded for a re-think once again, and got no further response.
On top of all this, let’s look at other inconsistencies..
Yes, if you know what you’re doing you may have a jolly good old time with this product, but I’m thinking of someone buying one for the first time and following instructions to use it, and I for one, do not want to advocate something that’s so horrifically written.
Should Teslacigs change their minimum requirements – as a suggestion, 0.35Ω for a single atomiser, and 0.7 for two, and ensure that the safer figures are on the mod and in the manual, then I will, in fact I will shout from the rooftops that Teslacigs realised they made a mistake and corrected it straight away, however, sadly, this looks unlikely.