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Discontinued The RBT Milaana (unregulated single 18650)

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cybrguy

Putin is a War Criminal
Are you making her sell some makeup? Shoes? :whoa:

Wait. Wait. You just moved to CO, you don't want to be single. Nevermind...
 
cybrguy,
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lazylathe

Almost there...
Broke out my faithful Blue Milaana and charged up some batteries.
I can only find my shorty stem so it can get a bit hot for me before the big clouds start...

For some reason, possibly read it here a long time ago, i am loading about 0,05g and tamping it down. Then i invert the stem so the herb is facing down.
Using my Storz&Bickel brush i compress it even more so it is even with the top of the stem and push it down slightly as the herb expands a bit.

5 second pre-heat and then a 3 second burst followed by a few feathering presses!
I get the snap, crackle and pop and then it starts to get too hot for me...
Clouds are still big and tasty but not as large as with the longer stem.

I then press the puck and basket back down the stem a bit and stir and recompress for the last hit.
ABV is a nice even light brown!

This is a tiny powerhouse of a vape!

Here is the old Blue!
mpORAro.jpg
 

KeroZen

Chronic vapaholic
So I was playing with the new gizmo I bought to measure battery internal impedance, and it appears it is also able to measure pretty low resistances. Accuracy is not the best, it's an entry level cheap tool, but it's precise down to 0.1mohm or so it claims (yes that's one tenth of a milli-ohm)

I first compared the value I got for my iHeat 510, as this value is also measured relatively precisely by my various e-cig mods (in order to do power or TC regulation you need a ohmmeter able to go down to the 0.01 ohm or even 0.001ohm range) and it was spot on at 0.36ohm.

Of course you can't just measure these low resistances with your average digital multimeter, you usually need pricier tools. But this new tool I got is quite alright and it's using the 4 wires measurement method to minimize the impact of the probes themselves.

I proceeded to measure my Milaana circuit resistance and I got 0.31ohm, not too shabby! This resistance translates to almost 57W of power at the theoretical 4.2V voltage. Of course we're not getting that much and not for long: cells don't rest at 4.2V anymore when they age, and their voltage sags due to their internal impedance (sum of internal resistance and internal reactance, cf http://en-us.fluke.com/training/tra...nary-batteries/what-is-battery-impedance.html)

I'll do a separate post in the battery safety thread about my experimentation with the tool, as it's very useful to determine any cell health, and it's easier and faster to do than measuring the IR using the old-school way with a power resistor. Basically you can track over time how this value evolves and determine how close to end of life your cells are.

I did a quick SPICE simulation to determine how much one of my cells would sag with the Milaana, knowing the cell IR, then I did a quick empirical test to confirm by setting one of my mods in power mode at 57W and watching the real-time circuit voltage value drop.

I got more apparent sag on the mod than in the simulation, but let's say that for an average not too old cell with around 0.050ohm internal resistance, resting at precisely 4.2V when full, as soon as you hit the trigger the circuit voltage drops to 3.61V and I'm "only" getting 42.2W of output power.

I used quotes around only because it runs bloody hot already and can definitely combust very fast. It requires constant attention in order to not brown the load too quickly or worse, and I must admit that I tend to forget all the technique needed since I've been using regulated vapes nearly exclusively.
 
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Bravesst

Full Steam Ahead
Manufacturer
Have you considered customizing your wife to your liking as you did your Mi? :rofl:

If only it were that easy, even though I have tried dragging her out to the "wood shed" a few times. Didn't go over big...

@KeroZen
Okay, awesome information, but how do I not deal with all that technical stuff? If I start off with genuine batteries, rotate / charge / store properly, and I'm a fairly heavy user, at say 10 daily stems, working with about 10 batteries, how long can I expect my VTC 5a cells to last?

In reality, I do handle my batteries this way, but after some months I can detect a performance drop and simply order more at the IMR price of $6.

In addition to hotter, longer between charges, will the 20700's last longer as well?
 
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KeroZen

Chronic vapaholic
The 20700 has the same life expectancy. But the 4000mAh one has noticeably more capacity, and the 3000mAh one should have both more capacity and more oomph than the VTC5.
 
KeroZen,

rvp5032

Well-Known Member
My Mi is expected to get here Friday nicccce. Kudos to vaped.com on the free fast shipping. That Ole blue is perdy. Pretty neat to see the different designs kinda sad I jusy got a plane one but if it works all that matters. I'll be sure to post thoughts once I get it. Until then I got my trusty mighty who's worried about getting from dethroned. Happy Thanksgiving cheers.
 

alex91

Well-Known Member
Unfortunately I’ve dropped my Mi and this happened. Is there going to be a problem or this shouldn’t affect anything?




I can insert the glass stem without a problem. I’m so sad this happened, but at least it will be an excuse to buy the next Milaana 2 :cry:
 
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almost there

Well-Known Member
Unfortunately I’ve dropped my Mi and this happened. Is there going to be a problem or this shouldn’t affect anything?




I can insert the glass stem without a problem. I’m so sad this happened, but at least it will be an excuse to buy the next Milaana 2 :cry:
sorry to see that my friend. You can just fill out a warranty request and send it in, most likely you'll be charged for the service but it beats looking at the cracked glass on a regular basis.
 

alex91

Well-Known Member
sorry to see that my friend. You can just fill out a warranty request and send it in, most likely you'll be charged for the service but it beats looking at the cracked glass on a regular basis.

Thank you. Unfortunately I don’t live in the US and it would be such a pain in the ass to send it back and wait for the return that I think I will just get used to it and live with this.
 

cannabis.pro

aka 420EDC
Accessory Maker
Thank you. Unfortunately I don’t live in the US and it would be such a pain in the ass to send it back and wait for the return that I think I will just get used to it and live with this.
Just be careful with stress on that joint moving forward. Don't stand the unit upright with a stem inserted, use the guitar pick and lay it on its side. Don't walk around with a stem inserted in your pocket. Don't expose to extremes beyond the thermal cycling already occurring like extreme cold.
 

Shit Snacks

Milaana. Lana. LANA. LANAAAA! (TM2/TP80/BAK/FW9)
My Mi is expected to get here Friday nicccce. Kudos to vaped.com on the free fast shipping. That Ole blue is perdy. Pretty neat to see the different designs kinda sad I jusy got a plane one but if it works all that matters. I'll be sure to post thoughts once I get it. Until then I got my trusty mighty who's worried about getting from dethroned. Happy Thanksgiving cheers.

That blue was actually stained by its owner, a beaut for sure, but I think you'll be surprised how nice even the maple of the Milaana looks now
 
Shit Snacks,
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