Lots of places to get them, Like here:
All-Battery.com: Tenergy 3.2V 1450mAh LiFePO4 18650 Rechargeable Battery
DNA 200 Watt
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Lots of places to get them, Like here:
All-Battery.com: Tenergy 3.2V 1450mAh LiFePO4 18650 Rechargeable Battery
Welp I bought all the pieces. got chip, hammond box, some wiring, some buttons and a fat daddy V4 low profile. probably will have everything by thursday.
got the Turnigy nano-tech 2200mah 3S 25~50C for the lipo. seems to be the best option from looking around. abit urgh on mah amount considering i use a sig 150 right now but the hammond dimensions stopped me from using a big 4500mah lifepo.
This is going to be fun. After buying everything and checking price. 180 euros. a bit steeper than I expected. if the new VS is going to end up like 200 euros I will probably cry abit haha.
got the Turnigy nano-tech 2200mah 3S 25~50C for the lipo. seems to be the best option from looking around. abit urgh on mah amount considering i use a sig 150 right now but the hammond dimensions stopped me from using a big 4500mah lifepo.
This is going to be fun. After buying everything and checking price. 180 euros. a bit steeper than I expected. if the new VS is going to end up like 200 euros I will probably cry abit haha.
I don't think LiFe's are going to be a good choice for the DNA200D unless you use a 4 cell pack. And even then, high amp draw is not a good fit for this battery tech I think. If only using between 20 and 40watts they will probably do OK, but LiPo's will do a much better job I would think. A lot depends on where the DNA200 has the low voltage cutoff (LVC) set (or if it's settable). If the LVC can be set to 3.0 or 2.9 LiFe's may not be too terrible, but if the LVC is 3.2 they won't do well at all.
Using a calculation I have seen (mah X C /1000) amps shouldn't be too much of a risk. one lifepo I saw (zippy 4200mah) it has a 30 constant C-rating.
so 4200 X 30 /1000 gives you a constant amp rating of 126 amps. and judging from the spec sheet on the DNA 200 it has a maximum current input of 23 amps the battery has pleeenty of room to survive.
meanwhile I am just wondering how the hell I am going to cut out the square hole for the screen.
LiFes are a very safe technology, so that's not an issue at all. And they can support a high discharge rate also. The issue for them is the full charge voltage is only 3.6v/cell (LiPos are 4.2v/cell). So if the DNA200 uses a conservative low voltage cutoff of 3.2v (I'm not sure what the LVC for the DNA200 is) it might not be able to use all it's available power. It is common to have a cutoff or 3.1 or 3.2v, so that really is going to be an important factor for how well LiFes do with this chip. Couple the LVC with the discharge curve of a LiFe cell, which starts out at 3.6v and drops pretty quickly to 3.2v where it stays for most of it's usable charge life and I'm just not sure it's going to perform well.
It's yet to be seen what the LVC of the DNA200 is, and that is probably the biggest concern I have with LiFe batteries with this chip. Maybe someone can chime that knows what the cutoff will be, and if it's settable in the software. LVC being settable to take advantage of LiFe battery technology, that differs quite a bit from LiPos, will be the deciding factor in how this battery tech will work I think. LiFes are designed to spend most of their time at 3.2v during a discharge cycle, so it's important the DNA200 can take advantage of this for LiFes to be viable. And even if the LVC cutoff is 3.1v, a nominal voltage of 3.2v on LiFes is going to trigger a LVC on the chip with normal voltage sag if vaping at high wattage, even though the LiFe pack is operating normally and within spec.
Just too early to say without knowing the complete specs of the DNA200, and seeing how much voltage drop occurs on a LiFe pack at high wattage vaping. I wouldn't be concerned at all about the LiFe pack being capable of doing the job, I just don't know If the DNA200 is smart enough to be able to use this different battery tech properly or if it just treats a LiFe pack as a LiPo pack... which would not be ideal.
It's a large battery pack..but yeah, even though zippy is a brand with a fire history(no slang). I'm sure this tech will improve, but I've always supported lipo's...just not people naive to the subject installing them.
Also, I wonder what's the peak voltage of this pack? I've seen some disclaimers of 15 Volts for 12Volt packs.
Maybe try using a drill or punch tool to get the faceplate hole started for cutting out?
The peak voltage for a 3cell LiFe pack is 10.8v and a 4cell LiFe pack is 14.4v. Both are within the max input voltage spec of 16v for the DNA200 so shouldn't present any problem. Since the DNA200 specs say that LiFe cells are an acceptable chemistry to use, there must be a setting in the software to tell it what battery type you are using. They would have to change the voltage ranges for the charging algorithms to reflect the different battery types. So maybe they also change the LVC as well when specifying LiFe battery type? I don't know, I'm not a beta tester, but it will be interesting to see how that's handled on the board.
I wouldn't run a 16V battery tbh. That is the absolute MAX (unspecified spec but confirmed) anything over and you will fry the thing.
I agree. I wouldn't run 16v either. But in reference to a 4cell LiFe at 14.4 it should be fine.
1-2 Weeks after release, China will announce something 5 times better in every way lol. We can expect evolv to catch up to chinas next release 2020 or 2021 maybe.. Expect new Yihi chips to be supported by lipo's from here on out and be 300W/300J with a software suite and bluetooth that hooks up to a mobile app that does everything evolvs desktop app does, maybe a colored OLED. O ya, and it will be less than half price from their manufacturing partners when it hits the mods. By the time evolv releases a real mod to compete with china's next 200 chips, we will have real smart mods.
Thats the name of the game =P
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The only chip that competes are the yihi ones. The rest of the Chinese chips are dog....e and most of them the TC isn't accurate. Just look at the EvicVT with that 30w surge and its horrid TC.... And evic is a known company.
Not sure if your post was sarcastic, my online ramble judgement isn't at its best today.
It was half sarcarm, half truth. Yihi is the only reputable chinese chip company, that is true.
Just insanity. Being able to preset builds is going to be amazing.
The only downside is that it doesn't utilize pwm. /s
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Thats in fact one of the highest upsides to this whole ordeal...
By default, the LiFe PO4 soft LVC is 2.84v, I am not sure what the Hard LVC is but it will be somewhat less.
ETA, the soft limit is configurable, albeit I am sure it limited by the HARD LVC.
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