Battery question

[Greg Brown]

I am looking at ideas for building my first mod. As I was thinking about batteries I happened to think about the battery in my cell phone a Samsung Galaxy Note 2. I have an aftermarket upgraded battery that is a 3.7V 6300mAh Li-ion battery. Does anyone know if these are protected batteries? I am looking to build a DNA20D mod. What I am wondering is if the 3.7V is enough to power it? From what I have been reading, most everyone is using a 4.2V battery. The reason I am looking at this is because of the small form factor coupled with the high mAh. Anyone have any thoughts on this?

I have also been tossing around the idea of building a mod using my previous phone which is an iPhone5. What would really be awesome is if I could mod it to output the required voltage to the headphone jack and keep everything else intact. Basically jailbreak the phone and then create an app that would control everything. I'm thinking that the internals would still need to be modified to push the required voltage through the headphone jack, but it is an interesting idea.

 

[pufZeppelin]

I can't answer your battery question, but reading your post made me think of this:

take special note of one of the pictures how the fluid tank connects to MOD (pretty wild)

the whole thing is very different for sure...

http://www.vaporbeast.com/Apocalypse-Power-Station-PV-p/36-0102-000.htm

 

[Greg Brown]

I can't answer your battery question, but reading your post made me think of this:

take special note of one of the pictures how the fluid tank connects to MOD (pretty wild)

the whole thing is very different for sure...

http://www.vaporbeast.com/Apocalypse-Power-Station-PV-p/36-0102-000.htm

That's really cool. Seems to be along the same lines as what I would like to do except with a DNA20D so it is both VV and VW.

 

[dr g]

I am looking at ideas for building my first mod. As I was thinking about batteries I happened to think about the battery in my cell phone a Samsung Galaxy Note 2. I have an aftermarket upgraded battery that is a 3.7V 6300mAh Li-ion battery. Does anyone know if these are protected batteries? I am looking to build a DNA20D mod. What I am wondering is if the 3.7V is enough to power it? From what I have been reading, most everyone is using a 4.2V battery. The reason I am looking at this is because of the small form factor coupled with the high mAh. Anyone have any thoughts on this?

Cell batteries as far as I know are almost always protected. 3.7V is the nominal voltage from lithium-ion chemistry, 4.2V is the fully charged voltage. Look for li-po RC batteries for a roughly equivalent form factor, but be aware of safety issues.

I have also been tossing around the idea of building a mod using my previous phone which is an iPhone5. What would really be awesome is if I could mod it to output the required voltage to the headphone jack and keep everything else intact. Basically jailbreak the phone and then create an app that would control everything. I'm thinking that the internals would still need to be modified to push the required voltage through the headphone jack, but it is an interesting idea.

This would not be practical. On the other hand a case that contained a built-in PV is something I've been thinking about for a while.

 

[dr g]

I can't answer your battery question, but reading your post made me think of this:

take special note of one of the pictures how the fluid tank connects to MOD (pretty wild)

the whole thing is very different for sure...

http://www.vaporbeast.com/Apocalypse-Power-Station-PV-p/36-0102-000.htm

This is just a power box with a USB-ego adaptor ... doesn't work very well as far as anyone has seen.

 

[Rocketman]

I am looking at ideas for building my first mod. As I was thinking about batteries I happened to think about the battery in my cell phone a Samsung Galaxy Note 2. I have an aftermarket upgraded battery that is a 3.7V 6300mAh Li-ion battery. Does anyone know if these are protected batteries? I am looking to build a DNA20D mod. What I am wondering is if the 3.7V is enough to power it? From what I have been reading, most everyone is using a 4.2V battery. The reason I am looking at this is because of the small form factor coupled with the high mAh. Anyone have any thoughts on this?

Not having the same battery, I will give some general comments about cell phone batteries.
Aftermarket batteries often exaggerate mah ratings. The factory battery for your phone is I believe 3100 mah, If the 6300 is twice as thick and a replacement phone back it will have 2 of those in it. Or 2 clones of that cell. The bare cells should be able to handle vaping currents but the protection circuit will likely limit current to less than 2 amps. A cell phone battery is a tempting package just as the available bare cells in that form factor. My guess is that using that 6300mah battery will not give you 6300 mah at vaping currents, and that it will continually trip the protection board, especially if trying to power a boost module.


The "3.7 volts" is "4.2 volts" 4.2 is the unloaded full charge voltage. 3.7 is the average charge voltage throughout discharge.

 

[Greg Brown]

Cell batteries as far as I know are almost always protected. 3.7V is the nominal voltage from lithium-ion chemistry, 4.2V is the fully charged voltage. Look for li-po RC batteries for a roughly equivalent form factor, but be aware of safety issues.

This would not be practical. On the other hand a case that contained a built-in PV is something I've been thinking about for a while.

So what is the advantage of using li-po over li-ion? Also, how do mods push out more voltage than what the battery is rated at. For instance, my eVic is using a 3.7 li-ion but it will push up to 5V. I'm assuming there is some sort of capacitor in these devices? I haven't opened one up to look inside yet. I don't know much about li-po batteries, but have considered li-ion batteries as fairly safe. Especially those with protection circuits or IMR. What are the safety issues with li-po?

As far as wiring, soldering, woodworking, metalworking are concerned I am pretty comfortable. My knowledge is limited in batteries and battery chemistry so I am trying to gain all of the knowledge on batteries before I start on my first mod.

 

[Greg Brown]

Not having the same battery, I will give some general comments about cell phone batteries.
Aftermarket batteries often exaggerate mah ratings. The factory battery for your phone is I believe 3100 mah, If the 6300 is twice as thick and a replacement phone back it will have 2 of those in it. Or 2 clones of that cell. The bare cells should be able to handle vaping currents but the protection circuit will likely limit current to less than 2 amps. A cell phone battery is a tempting package just as the available bare cells in that form factor. My guess is that using that 6300mah battery will not give you 6300 mah at vaping currents, and that it will continually trip the protection board, especially if trying to power a boost module.


The "3.7 volts" is "4.2 volts" 4.2 is the unloaded full charge voltage. 3.7 is the average charge voltage throughout discharge.

I would bet you are spot on with that assessment. It is twice as thick with a replacement back as you described. I just never thought of it in terms of two separate cells in there. As far as the mAh is concerned, they may exaggerate it, however I do seem to get about double the battery life as compared to the factory battery.

 

[Rocketman]

Greg,
I applaud your desire to learn and DIY. I would do some Google work on battery chemistry, and search around in this forum for some info on proven voltage boosting circuitry used in mods (APVs).
Since you expressed a desire to use a DNA20 mod, search for examples that have worked.
Follow what they did.
Keep moving on your quest but an old saying comes to mind;
"I know just enough to be ----------"

Have fun, be safe.

 

[retird]

Basic to Advanced Battery Information from Battery University

 

[Greg Brown]

Greg,
I applaud your desire to learn and DIY. I would do some Google work on battery chemistry, and search around in this forum for some info on proven voltage boosting circuitry used in mods (APVs).
Since you expressed a desire to use a DNA20 mod, search for examples that have worked.
Follow what they did.
Keep moving on your quest but an old saying comes to mind;
"I know just enough to be ----------"

Have fun, be safe.

Absolutely! I don't want to win any Darwin awards if you know what I mean. Like I said, I have a fairly good knowledge of electronics although I have been out of the field for a while and moved on to computers. However, in my line of work in electronics we rarely used batteries and back then they were far different than they are now. Just need to get up to speed on all of the battery stuff and I will be good to go. I have looked at several of the DNA20D mods and would like to give mamu's Milo a shot soon. Looks really straightforward and should be well within my scope of knowledge to start with. The bonus is the end result is a very competent device that will compete with or even outpace most of the "off-the-shelf" devices.

This is so much fun, and I'm only getting started!

 

[LucentShadow]

Personally, I would not use any battery that I could not find good specs for with the DNA20D. It's a pretty demanding control unit that recommends a minimum of 7 amps continuous current rating on the battery used. By my calculations, that's about what it'll pull from a low battery when set to 20W, so I'd prefer higher current rating.

http://evolvapor.com/wp-content/uploads/dna20.pdf

I'm not much into smart phone batteries, but I doubt that they would be suitable for the DNA20D. I'd certainly see if I could find a datasheet for them, before considering.

 

[Rocketman]

Just a guess (and don't think I'm trying to discourage your efforts) but just from what you have posted I would suggest building a few less complicated mods first.
A DNA 20 mod, or even a vaping app for an Iphone 5 might be a little 'above your pay grade', technically.
Lots of easy to learn from examples in this forum.
It's so easy, using your skills, to start off with a mod, then move to a better one, then a better one, etc.
When you are building them yourself it's not like spending money on a store bought mod, you are learning as you go when you DIY.
Learning be good,right?