DNA modders' board project
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If I were building a small unit the minimum sized battery I would consider would be an AW IMR 18500 (18490) 1100 mah...they are not that big... and I would have 2 of them in parallel...
I have thought of that.
For this project I was thinking of a almost pure PT just putting the smallest battery in it to get it to work. Keeping it hooked up to the wall for the most part. What would be the smallest battery you think could be used for this application.
For this project I was thinking of a almost pure PT just putting the smallest battery in it to get it to work. Keeping it hooked up to the wall for the most part. What would be the smallest battery you think could be used for this application.
That's what I use in my GGTSDNA and I like it a lot. Works well with the Kick so I think Evolv might have that one in mind when they design their devices.
You cannot have a pure PT since the charging circuit is limited to 500 milliamp...even if you have a charger that puts out 2 amps, the batteries will only charge at a 500 milliamp rate....so you are vaping off of the batteries all the time...and they will be recharged at a slower rate, thus you need enough battery to get you thru the day...
I saw a mod the other day that used imr 14500's....same length as the 18500 but just a bit smaller in diameter....
To me, battery safety is a primary factor, and oversizing the batteries is the only way I will build one....
a 18490 battery is just a bit less than 2" tall....ya could use just one battery, but you may not get thru the day because the battery discharge rate while vaping will not equal the charge rate of 500 milliamps....depending on your vaping frequency...
I saw a mod the other day that used imr 14500's....same length as the 18500 but just a bit smaller in diameter....
To me, battery safety is a primary factor, and oversizing the batteries is the only way I will build one....
a 18490 battery is just a bit less than 2" tall....ya could use just one battery, but you may not get thru the day because the battery discharge rate while vaping will not equal the charge rate of 500 milliamps....depending on your vaping frequency...
I saw your GGTSDNA mod (Killer) got an extra tub here and will be attempting that down the road.
Good job.
Good job.
Ok I got it now. Wish I could set this up as a PT, I think it would be killer.
Thanks for the info this thread is always educational.
Looking forward to playing with these. I have (8) on hand and will pick up more as time goes buy. Cheep fun IMO.
Thanks for the info this thread is always educational.
Looking forward to playing with these. I have (8) on hand and will pick up more as time goes buy. Cheep fun IMO.
Just to let ya know, I used a imr 18490 (1100 mah) with a kick and got about 5 hours of vaping between charges....
Good luck on your build...give us pics when ya get-r-done...
The one I'm currently building will be a 1" square x 3.15" long....with usb charging....using 2- Li-Polymer 3.7V 800mAh 10C Batteries....
similar to these (not purchase here)....
http://www.all-battery.com/TenergyLi-Polymer6025663.7V900mAh10CBattery-30501.aspx
Good luck on your build...give us pics when ya get-r-done...
The one I'm currently building will be a 1" square x 3.15" long....with usb charging....using 2- Li-Polymer 3.7V 800mAh 10C Batteries....
similar to these (not purchase here)....
http://www.all-battery.com/TenergyLi-Polymer6025663.7V900mAh10CBattery-30501.aspx
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Sounds good.
I have been looking at these types of battery's as they have been posted here. I will do one or two with them in time.
I will post photos as soon as the first project is completed.
I have a few ideas on the board right now.
A DNA carto Tank mod is most likely be the first thing on the list for this weekend.
I have been looking at these types of battery's as they have been posted here. I will do one or two with them in time.
I will post photos as soon as the first project is completed.
I have a few ideas on the board right now.
A DNA carto Tank mod is most likely be the first thing on the list for this weekend. this board was crack on me in vaping. A smal short circuit and was gone. I pass to DNA. Evolve use small mosfet who don`t carre current in shortcircuit, and use a PTC fuse for protection, that PTC it have a failure and.....
Sorry, don't mean to threadjack, but does anyone think it might be possible to use 3 NiMh AA's as a power source for this board? They should be able to put out 6 amps steady current with a similar voltage range to li-ion. Anyone have any input?
I think you might be mixing up your series and parallels johnny - 3 x aa will give you 3.6v/ 2A OR 1.2v /6A
Well your math is correct, but I don't know where you come up with the two amp limit, eneloop shows a power graph on their site with a 6 amp discharge rate, and it still gave More than 1800 mah. With the typical draw from the DNA board at 3.5 amps I don't see this not working, but I may still be wrong. Any more ideas?
Hi Johnny. I looked at the chart you're talking about, and I'm no expert but the graph has a line for 4000mA, but that isn't 6A, it's 4A. Also you pointed to the fact that the plot for 4000mA went all the way out to 1800mAh and it does, but at that discharge rate, it shows the bat only being able to produce about 1.05V. That being said, you would probably need 4 of these in parrallel to drive a DNA chip. As I mentioned, I'm no expert and there may be another reason that it would be unsafe to use these bats, but I have to ask why you would want to use 4 AA's in parrallel when you could achieve the same result with one or even 2 14500 in parallel? Seems like a crazy waste of space, even if it's safe, and it may not be.
NiMh is considered a very safe chemistry, they woul need to be wired in series, not parallel, as the DNA has an under voltage shutoff of 3.1v under load. The shutoff would be nearly perfect with the cells cutting out at 3.15, also I don't really mind a large mod, I just prefer not to have to order batteries online. Oh and sorry about the confusion with the 6 amps, I looked at that graph again and you're totally right
I would be really concerned about essentially stacking 4 bats. It seems like asking for trouble to me. Just don't blow yourself up my friend. We're taking enough heat as it is.
Ok well I found this graph on the candle power forums, in light of this information I think I'm going to go for it.
NiMh Battery Shoot Out. Sorry about the link you have to scroll down quite a bit. My phone wouldn't let me copy the picture directly.
NiMh Battery Shoot Out. Sorry about the link you have to scroll down quite a bit. My phone wouldn't let me copy the picture directly.
Sorry Johnny, I completely misunderstood your post (I read it as amp hours !), so my answer was irrelevant.
You've got an interesting idea, and I'd like to hear how it turns out.
Did you see this thread a couple of months ago? - Not specifically to do with the DNA, but it might be useful.
http://www.e-cigarette-forum.com/forum/battery-mods/290016-some-nimh-battery-configurations.html#post5891485
You've got an interesting idea, and I'd like to hear how it turns out.
Did you see this thread a couple of months ago? - Not specifically to do with the DNA, but it might be useful.
http://www.e-cigarette-forum.com/forum/battery-mods/290016-some-nimh-battery-configurations.html#post5891485
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From the DNA Datasheet:
A single cell rechargeable lithium chemistry battery is recommended. Either a lithium ion or a lithium polymer type can be used. Any battery used should be rated for a MINIMUM of 5 amps continuous discharge current. High C rated lithium polymer or IMR cylindrical cells are strongly preferred.
A single cell rechargeable lithium chemistry battery is recommended. Either a lithium ion or a lithium polymer type can be used. Any battery used should be rated for a MINIMUM of 5 amps continuous discharge current. High C rated lithium polymer or IMR cylindrical cells are strongly preferred.
Hi mamu. First of all thanks for all these very interesting measurements and thanks for the instructions to use two DNAs together. I'm particularly interested in this configuration (as 12W is a bit "anemic" for my tastes) and would like to know if you have been able to conduct further testing with standard atoms. The 15.1W with a 2.4 ohm atty result is encouraging but I've always felt that the strongest point of a VW approach was to be able to use different atoms without worrying too much about ohms and such.
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