Evolv DNA 75
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@RGLP4Lyfe: he DNA75 will use a lipo or a 18650. Lipos come in many different sizes and shapes. Besides size, the only other thing you have to worry about is the current it can handle.
I am sure you use lipos. I got them in my cellphones, MP3 players, smart watches, flashlights, RC stuff, laptops, tablets, etc. I actually hate them myself. They are usually a PIA to replace and/or charge externally.
No, a good single 18650 is enough, probably enough for most people, but LiPos have more guts and if you are really pushing it a LiPo or dual 18650s would be worth thinking about IMO. You would want a 3.7 V 1S LiPo.
Lithium Ion Polymer is not a Lithium Polymer battery that can sustain vaping wattages.
Yeah this isn't the first time I have heard this. Here check this out:
Lithium Polymer vs Lithium-Ion batteries: What’s the deal?
Lithium Ion Polymer are low output batteries. Put them in a mod and they'll vent even at MTL wattages. True lithium polymer have higher output wattages to them. This isn't described in devices that use Lithium Ion. There definitely is a difference, regardless to what that article says. A cell phone lithium ion battery will never be able to hit at wattages high enough to vape. If they were made the same, you would be able to. Please don't attempt this at home haha. The batteries we use in RC have outputs of 90-100C. 6000Mah 2S2P packs can fire 600A. Try that with any electronic device with lithium ion and you'll be running for a fire extinguisher.
Another note: Lithium Ion Polymer batteries can be ruptured without bursting into flame upon contacting oxygen. Lithium polymer cannot. As soon as oxygen hits them they ignite. Depending on the current charge, it can be violent as well.
Another note: Lithium Ion Polymer batteries can be ruptured without bursting into flame upon contacting oxygen. Lithium polymer cannot. As soon as oxygen hits them they ignite. Depending on the current charge, it can be violent as well.
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Here is Dave, many of us electronic engineers subscribe to his videos. And just after the 2 minute mark it says they are the same.
I don't recall if Professor Jeff Dahn (Dalhousie University) mentioned it in the below video. But this is a good video about Lithium cells if you can keep up with it. For some it might be too deep.
I really didn't type what I was trying to say. I'm a victim of the public school system haha. Lithium Ion in my circle (RC) is for low powered devices. Li-Po is a term we use for high powered devices. In fact, Li-Po is a generic term for Lithium based batteries. But everyone needs to understand there are very distinct differences in all the different chemistry's of these cells. A phone battery is not the same chemistry used in batteries for vaping. A phone battery is designed for lower, sustained output. Where lipos used in vaping are designed to handle extremely high current rates. This is what I was trying to say, but not succeeding well. Haha. Here's an article where he talks about Lithium chemistry's. They are very different and dangerous if you choose the wrong one.
Which is a better battery for a smartphone Li-Ion or Li-Po? - Quora
Which is a better battery for a smartphone Li-Ion or Li-Po? - Quora
Right in the very beginning it says:
Let me try to clear up some confusion here. In the current battery market, Li-ion is the same as Li-Po (or is also called Li-Poly or Li-Polymer or pouch cells); only the packaging material and shapes are different. In smartphones, flat pouch Li-ion cells are used, because it can be made the thinnest.
This is what I have been saying all along. In the second paragraph Karl Young states:
Li-ion is a general term for at least 6-different major lithium-battery chemistries that are used for different applications (LCO, LMO, NMC, LFP, LTO, LNA).
I elaborated more below about the types I know of.
Lithium Cobalt Oxide (LiCoO2, LCO or Li-cobalt)
Let me try to clear up some confusion here. In the current battery market, Li-ion is the same as Li-Po (or is also called Li-Poly or Li-Polymer or pouch cells); only the packaging material and shapes are different. In smartphones, flat pouch Li-ion cells are used, because it can be made the thinnest.
This is what I have been saying all along. In the second paragraph Karl Young states:
Li-ion is a general term for at least 6-different major lithium-battery chemistries that are used for different applications (LCO, LMO, NMC, LFP, LTO, LNA).
I elaborated more below about the types I know of.
Lithium Cobalt Oxide (LiCoO2, LCO or Li-cobalt)
Common for mobile phones, laptops and digital cameras [the original Li-ion].
ICR 3.0–4.2V/cell, 3.60V nominal (These are the most dangerous)
Lithium Manganese Oxide (LiMn2O4, LMO or Li-manganese)ICR 3.0–4.2V/cell, 3.60V nominal (These are the most dangerous)
Commonly used for power tools, medical instruments, as well as hybrid and electric vehicles.
IMR 3.0–4.2V/cell, 3.70V (3.80V) nominal
Lithium Nickel Manganese Cobalt Oxide (LiNiMnCoO2, NMC, NCM, CMN, CNM, MNC, or MCN)IMR 3.0–4.2V/cell, 3.70V (3.80V) nominal
Commonly used for power tools, 18650s, e-bikes and other electric powertrains.
INR 3.0–4.2V/cell, or higher, 3.70V nominal
Lithium Iron Phosphate (LiFePO4, LFP or Li-phosphate)INR 3.0–4.2V/cell, or higher, 3.70V nominal
Commonly used for replacing lead acid battery applications.
IFR 2.5–3.65V/cell, 3.30V nominal (high discharge)
Lithium Nickel Cobalt Aluminum Oxide (LiNiCoAlO2, LNA, NCA or Li-aluminum)IFR 2.5–3.65V/cell, 3.30V nominal (high discharge)
Commonly used for medical devices, industrial, electric powertrain
NCA 3.0–4.2V/cell, 3.60V nominal
Lithium Titanate (Li4Ti5O12, LTO or Li-titanate)NCA 3.0–4.2V/cell, 3.60V nominal
Commonly used for electric powertrains, UPS and solar-powered street lighting.
1.8–2.85V/cell, 2.40V nominal
1.8–2.85V/cell, 2.40V nominal
This sums it up pretty well. Just an excerpt. Hybrids are what are used in dna devices etc.
In the RC world today, most battery packs are of the LiPo type. I thought I should include a short discussion on the Li-Ion type of pack just in case you come across one as they are used in some higher end radios. Li-Ion and LiPo batteries have essentially the same chemical make-up, they both rely on lithium ion exchange between the lithium carbon cathode & anode, and are cared for in the same way; the primary differences are in how the cells are packaged and the type of electrolyte that is used.
Li-Ion
Li-Ion batteries use a flammable solvent based organic liquid as the electrolyte. This electrolyte is responsible for the lithium ion exchange between the electrodes (anode and cathode) just like any type of battery. Li-Ion batteries are usually encased in a hard metal can (again like a more conventional battery) to keep the electrodes wound up tight against the separator sheet adding weight and not allowing many different options as far as shape and size.
LiPo
A true LiPo battery doesn’t use a liquid electrolyte but instead uses a dry electrolyte polymer separator sheet that resembles a thin plastic film. This separator is sandwiched (actually laminated) between the anode and cathode of the battery (lithium carbon coated aluminum & copper plates) allowing for the lithium ion exchange – thus the name lithium polymer. This method allows for a very thin and wide range of shapes and sizes of cells.
The problem with true LiPo cell construction is the lithium ion exchange through the dry electrolyte polymer is slow and thus greatly reduces the discharge and charging rates. This problem can be somewhat overcome by heating up the battery to allow for a faster lithium ion exchange through the polymer between anode and cathode, but is not practical for most applications.
If they could crack this problem, the safety risk of lithium batteries would be greatly reduced. With the big push towards electric cars and energy storage, there is no doubt some pretty huge developments will be made in ultra light weight dry and safe LiPo’s in the coming years. Seeing that theoretically this type of battery could be made flexible, almost like a fabric, just think of the possibilities.
LiPo Hybrids
All RC LiPo batteries out there at the time of this write up (March 2014) are actually a hybrid lithium polymer battery. The correct name for this type of battery is lithium-ion polymer, but the battery world of today simply calls them lithium polymer even though they are not a true dry type LiPo battery.
By introducing a gelled organic/solvent based electrolyte to saturate the polymer separator, the lithium ion exchange rate between anode and cathode is improved immensely. LiPo hybrids like Li-Ion can still burst and catch on fire if over charged, shorted, punctured, or incinerated.
When first introduced, LiPo batteries were more expensive than Li-Ion because they are more labor intensive to manufacture. Fortunately prices have dropped substantially since they have become as, if not more popular than Li-Ion battery technology. This holds especially true for electric powered RC aircraft and the real driver behind LiPo battery research – portable communication/entertainment devices.
In the RC world today, most battery packs are of the LiPo type. I thought I should include a short discussion on the Li-Ion type of pack just in case you come across one as they are used in some higher end radios. Li-Ion and LiPo batteries have essentially the same chemical make-up, they both rely on lithium ion exchange between the lithium carbon cathode & anode, and are cared for in the same way; the primary differences are in how the cells are packaged and the type of electrolyte that is used.
Li-Ion
Li-Ion batteries use a flammable solvent based organic liquid as the electrolyte. This electrolyte is responsible for the lithium ion exchange between the electrodes (anode and cathode) just like any type of battery. Li-Ion batteries are usually encased in a hard metal can (again like a more conventional battery) to keep the electrodes wound up tight against the separator sheet adding weight and not allowing many different options as far as shape and size.
LiPo
A true LiPo battery doesn’t use a liquid electrolyte but instead uses a dry electrolyte polymer separator sheet that resembles a thin plastic film. This separator is sandwiched (actually laminated) between the anode and cathode of the battery (lithium carbon coated aluminum & copper plates) allowing for the lithium ion exchange – thus the name lithium polymer. This method allows for a very thin and wide range of shapes and sizes of cells.
The problem with true LiPo cell construction is the lithium ion exchange through the dry electrolyte polymer is slow and thus greatly reduces the discharge and charging rates. This problem can be somewhat overcome by heating up the battery to allow for a faster lithium ion exchange through the polymer between anode and cathode, but is not practical for most applications.
If they could crack this problem, the safety risk of lithium batteries would be greatly reduced. With the big push towards electric cars and energy storage, there is no doubt some pretty huge developments will be made in ultra light weight dry and safe LiPo’s in the coming years. Seeing that theoretically this type of battery could be made flexible, almost like a fabric, just think of the possibilities.
LiPo Hybrids
All RC LiPo batteries out there at the time of this write up (March 2014) are actually a hybrid lithium polymer battery. The correct name for this type of battery is lithium-ion polymer, but the battery world of today simply calls them lithium polymer even though they are not a true dry type LiPo battery.
By introducing a gelled organic/solvent based electrolyte to saturate the polymer separator, the lithium ion exchange rate between anode and cathode is improved immensely. LiPo hybrids like Li-Ion can still burst and catch on fire if over charged, shorted, punctured, or incinerated.
When first introduced, LiPo batteries were more expensive than Li-Ion because they are more labor intensive to manufacture. Fortunately prices have dropped substantially since they have become as, if not more popular than Li-Ion battery technology. This holds especially true for electric powered RC aircraft and the real driver behind LiPo battery research – portable communication/entertainment devices.
The DNA75 has been officially released and they will continue software enhancements as needed. Yet another option for us vapers.
I have the original VaporFlask - it has the original DNA40 small screen & dual 18650's - the only thing I need is a drop-in replacement DNA40 that is titanium aware, would the DNA75 fit? - Is it programmable for a titanium heat curve?
It wouldn't drop straight in, you would need to extend the screen cable, enlarge the screen aperture, do something for the USB and the board is longer, so I would expect that would be no for most people. I use titanium on DAN 40s by reducing the temp 90-100 F.
One of the things that concerns me about this chip is that it's only 85% efficient. Kind of strange coming from the DNA 200 at 97% efficiency.
it's less efficient because it's a buck and boost (boost portion tends to be less efficient than buck converter. Boost converters are typically less efficient than Buck converters, but not by much. The fundamental reason has to do with the inductor current flowing directly to ground during the on-time, instead of through the load, like it does on Buck converters.) and the 75 watt max output is also another factor.
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