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kooper primus 300w
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paulS Offline
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Post: #1
kooper primus 300w
http://vapenw.com/primus-300w-tc-box-mod-by-koopor


Specifications:
  • Wattage Range: 1.0W - 300W
  • Temperature Range: 200°F - 600°F / 100°C - 315°C
  • Compatible With Ni200, Titanium, & Stainless Steel Wires
  • Requires (3) 18650 Batteries (Batteries Sold Separately)
  • Magnetic Battery Panel
  • Spring Loaded Brass 510 Pin
  • Large OLED Screen
  • Fully Functional Menu System
  • Firmware Upgradeable (Via Micro USB Only)
  • More Information Coming Soon!
Package Contents:
  • 1 x Primus 300W TC Mod by KOOPOR
  • More Information Coming Soon!

IT"S HERE!!! WTF> three hundred watts of power for 100 dollars.

[Image: Eqyojf3.jpg?1]
(This post was last modified: 27-03-2016 03:27 AM by paulS.)
27-03-2016 03:26 AM
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Skyray Offline
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Post: #2
RE: kooper primus 300w
Looks good Smile
01-04-2016 11:59 PM
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Don Online
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Post: #3
RE: kooper primus 300w
300W is way in excess of what three 18650s can safely do. I'd bet on it topping out below 200. Which is a good thing.

300W at 12.6V is just shy of 24A. Which is (marginally) not OK though in VTC3 territory. But those cells will sag like crazy - you are looking at more like 40A at the voltages the cells will drop to under load.

This is not OK for any round cell on the market.

TVF tested battery info to be found here

http://www.preventsuicideapp.com

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02-04-2016 08:15 AM
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paulS Offline
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Post: #4
RE: kooper primus 300w
When i have used a true 200 watt device on my RDAs in testing I have watched my cotton go up in flames. Never mind the battery issues. Now Don 3 batteries with a parallel connection can handle the current in wattage You do have 60 amp current to play with. In a series connection you are FUBAR! Basically you are running 100 watts off a single 18650. The voltage and heat is quite another matter and that is not safe at all. You will really need to know your ohm's law and coils to build for that high a wattage safely. I just wrote up some thoughts on this subject in the general forum in an article on mech mods. Now I'm goping to assume that mod has some built in protections and hitting 300 watts will be unlikely. All you would do is burn your coils up anyway. I posted the link to the mod hoping it would generate a discussion on how ridiculous these watt wars are becoming. Yours is the first shot.

You are the battery guru don. This is how I thought it worked out. At 300 watts on a .25 coil you are drawing around 27 amps of current at 7.7 - 7.8 voltage. So theoretically it can be done. This does not account for cheap chinese devices and their switches and connections though. Or their accuracy.

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(This post was last modified: 02-04-2016 09:23 AM by paulS.)
02-04-2016 08:26 AM
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ecignut Offline
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Post: #5
RE: kooper primus 300w
You are all crazy - 300W would light up Time Square - I suppose the boundaries are there to be broken. I went a bit too far yesterday - vaped at 12W on my dripper.
02-04-2016 08:57 AM
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paulS Offline
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Post: #6
RE: kooper primus 300w
Don is certainly advocating for this device and I'm not a fan either but it was worth bringing to light I thought. I think we will be hearing more on this as there seems to be no limit. What next? A regulated Hammer of God?

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02-04-2016 09:25 AM
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Don Online
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Post: #7
RE: kooper primus 300w
(02-04-2016 08:26 AM)paulS Wrote:  When i have used a true 200 watt device on my RDAs in testing I have watched my cotton go up in flames. Never mind the battery issues. Now Don 3 batteries with a parallel connection can handle the current in wattage You do have 60 amp current to play with. In a series connection you are FUBAR! Basically you are running 100 watts off a single 18650. The voltage and heat is quite another matter and that is not safe at all. You will really need to know your ohm's law and coils to build for that high a wattage safely. I just wrote up some thoughts on this subject in the general forum in an article on mech mods. Now I'm goping to assume that mod has some built in protections and hitting 300 watts will be unlikely. All you would do is burn your coils up anyway. I posted the link to the mod hoping it would generate a discussion on how ridiculous these watt wars are becoming. Yours is the first shot.

You are the battery guru don. This is how I thought it worked out. At 300 watts on a .25 coil you are drawing around 27 amps of current at 7.7 - 7.8 voltage. So theoretically it can be done. This does not account for cheap chinese devices and their switches and connections though. Or their accuracy.

The issue is the crazy sag in voltage that hits 18650s when made to produce high currents.. Mike's mod has a handy volt and ammeter, at 16A, the dual (parallel) cells into 0.19 ohms are sagging to around 2.9V. OK they need charging so I'll repeat this once I've charged them again. At 3V (Under load) I need 100A from parallel cells or 33.3A each. They had better be very well balanced at those currents.

The nice folks from Kuro (I think) have made Todd a power meter with a 510 so he can check the actual power output of mods. I look forward to seeing what he discovers.

All the above ignores losses - which even with well-designed circuitry is at least 10%. Cheap and easy PWM circuits can use 30%. All of that has to come out of the cells.

As a rule of thumb, I reckon 50-60W per 18650 cell is the maximum that is wise. And that's with good cells.

TVF tested battery info to be found here

http://www.preventsuicideapp.com

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02-04-2016 10:57 AM
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paulS Offline
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Post: #8
RE: kooper primus 300w
Which is why you are the battery expert and not me Don. Of course you are corect. I vaguely alluded to it - I know these devices are not that simple to determine exact voltages. I was not aware until now how much I was ignorant of. Thank you.

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02-04-2016 12:14 PM
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Michael (04-02-2016)
Don Online
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Post: #9
RE: kooper primus 300w
(02-04-2016 12:14 PM)paulS Wrote:  Which is why you are the battery expert and not me Don. Of course you are corect. I vaguely alluded to it - I know these devices are not that simple to determine exact voltages. I was not aware until now how much I was ignorant of. Thank you.

For some reason I have to reply to a post to get the editor.

Here we go. Dual parallel Samsung 25R 18650s straight from the charger. This is a frame grab from video as most of it was out of focus.

[Image: 25915340040_552175e3fb_b.jpg]

That's 18A so 9 amps each and they have sagged to 3.48V from 4.2. And 9A isn't even close to making the cells sweat, they are good for 20A. The cells are only doing 32W each.

Mike's mod meter is a really neat gadget!

TVF tested battery info to be found here

http://www.preventsuicideapp.com

[Image: 24291313393_16615b20b2_m.jpg]
02-04-2016 01:58 PM
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gentlydoingit* Offline
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Post: #10
RE: kooper primus 300w
It's info is exactly what you want in a mod, I was very impressed with the quality. Wish I'd gotten it square in the hole though Confused haha

Don't forget to apply for the freecycle section!
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02-04-2016 02:34 PM
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