Dna20 and evic 3400mah batteries

[testdruif]

Anyone know if these 3400 mah green evic (sanyo 18650b) are a good choice in combination with a dna20 board?

Wanna build a mod with a large "standard" battery but don't want the thing to explode because it's an unsafe battery

Thanks

[markm]

I haven't any exp of them, but have doubts about the Mah rating - just seems unrealistic in that size.

[testdruif]

The mah rating doesn't really mean that much to me, I rather would like to know if this type of battery is safe to use
if a 3400 mah or 2600 mah battery blows up in my had I wouldn't think the mah makes a difference

[Deleted]

Got the datasheet for that Sanyo?

[testdruif]

Unfortunately I cannot find one.

Here's a link to the exact battery tho

www.myfreedomsmokes.com/evic-variable-voltage-mod/joyetech-evic-vv-mod-sanyo-18650b-battery-3400mah-sold-out/

[Deleted]

I have a VERY strong feeling, that its a panasonic battery rebadged, the NCR18650B only has a maximum discharge rate of 6.8 amps, which is just shy of the 7 amp recommendation for the DNA20.

It will work, and being a panasonic it'll be safe enough, but the lesser than the recommended.

[testdruif]

Aug 20, 2013 19:56:28 GMT digiw0rx said:

I have a VERY strong feeling, that its a panasonic battery rebadged, the NCR18650B only has a maximum discharge rate of 6.8 amps, which is just shy of the 7 amp recommendation for the DNA20.

It will work, and being a panasonic it'll be safe enough, but the lesser than the recommended.

Thank you very much good sir!
If my hands or face do blow up I shall not hold this comment against you!

[Deleted]

Aug 20, 2013 20:00:15 GMT testdruif said:

Aug 20, 2013 19:56:28 GMT digiw0rx said:

I have a VERY strong feeling, that its a panasonic battery rebadged, the NCR18650B only has a maximum discharge rate of 6.8 amps, which is just shy of the 7 amp recommendation for the DNA20.

It will work, and being a panasonic it'll be safe enough, but the lesser than the recommended.

Thank you very much good sir!
If my hands or face do blow up I shall not hold this comment against you!

Do you have any of the grey panasonic 18650's? they'd be much better for it.

[testdruif]

Aug 20, 2013 20:04:38 GMT digiw0rx said:

Aug 20, 2013 20:00:15 GMT testdruif said:

Thank you very much good sir!
If my hands or face do blow up I shall not hold this comment against you!

Do you have any of the grey panasonic 18650's? they'd be much better for it.

Unfortunately not but I also have some efest batteries incoming, although also 6.8 amps they are IMR with build in protection so I can choose which ones to put in that specific mod.
Planning on making some other (unregulated & with different boards) mods so I've got a good use for any battery

[Deleted]

Ok, just make sure you read up on the data sheets etc before attempting any mod etc.

this comes from the DNA20 datasheet.

Battery:
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 7 amps
continuous discharge current. High C rated lithium polymer or IMR cylindrical cells are strongly
preferred.

[testdruif]

Aug 20, 2013 20:09:46 GMT digiw0rx said:

Ok, just make sure you read up on the data sheets etc before attempting any mod etc.

this comes from the DNA20 datasheet.

Battery:
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 7 amps
continuous discharge current. High C rated lithium polymer or IMR cylindrical cells are strongly
preferred.

Indeedy,

I've already studied the datasheet of the dna20 board a length (5 minutes for a few pages)

Only sad thing is that the dna20 does not have a reverse battery stupid user protection

[Deleted]

There are ways of doing it, but it results in a voltage drop, only simple solution i can think of is create a battery holder which only accepts button tops, and use button top batteries.

[Brambles]

Here is some data for the Panasonic/Sanyo batteries. Sanyo Batteries are now part of Panasonic. The CGR18650CH which is the grey one is no longer listed in panasonics online data. Well it is somewhere as I recently downloaded but always have trouble finding online. The voltage characteristics are better so if you are cutting off at 3.2 volts the usable capacity is not much less with the CGR18650CH. The CGR18650CH does not have over current protection so can supply up 10 Amps. There is not much call for this battery now in industrial use so I believe are phasing it out/obsolete the preference is to place two batteries in parallel for high current applications. At the end of the day 20 watts is a heck of a power for an atomiser and cannot see anyone enjoying the amount of vapour it would produce. The panasonic battereis are regarded as being very safe so as long as you control the max charge voltage and the minimum discharge voltage which the DNA20 board does then you should be fine. Again, like all lithium batteries replace when the capacity falls off. The NCR range replaced the CGR and have a slightly different technology to give much higher capacity if discharging down to 2.5 volts.

industrial.panasonic.com/www-cgi/jvcr21pz.cgi?E+BA+3+ACA4001+4++WW

Hope this helps a bit.

[Deleted]

Yeah, problem is the NCR range don't have a 10amp limit.

I don't think Panasonic like the fact we use there batteries for ecigarette use as they aren't designed for that.

And it is more than possibly to vape at over 20 watts, and it isn't as bad as people may think, but it works best with 100% VG and low nic, 20 watts isn't a revelation though, as it's possible to achieve 21 watts with a ProVari

[Brambles]

Just tried 15 watts - Hey not bad and good flavour, but only if coil and wick is well flooded. I can see now 20 watts would not be too much for some, especially with a bottom coil.