The Next Step

[chockfullofmoxie]

Alright I have been vaping primarily since February. A couple of cigarettes here and there but not much. I have moved up the ranks from ....ty ecigs, to an ego style pen, my wonderful mvp, two weeks ago I finally got my first mech mod. I went to a shop to get a good battery instead of the ....ty battery it came with, I learned how to wrap my coils, use my multi meter to check my ohms. For some reason after talking to the guys in two different shops I have this weird block. I wrapped a set of coils at .7 ohms and I was fine, I tried a new build at .5 ohms and for some reason it freaks me out. I have a IMR18650 3.7 38A li-mn battery but I am scared of it blowing up in my face. I guess I miss the safety features of my other mods. Did this happen to anyone else when they switched to a mech mod, and will time and experience cause this fear to go away or should i get another mod that has safety features?

I realize this post probably shouldn't be in this forum but I am a new member so I can't post anywhere else.

Thanks.

Ricky

 

[BlackHazard]

As long as your within the batteries limits you should be fine, although I must warn you, that 38 amp battery your carrying is most likely a 20 amp continuous discharge battery and I wouldn't go above that limit! If you can find testing that says otherwise it's up to you but I'd remain within that 20 amp limit and maybe give yourself 20% worth of headroom on the battery. If your looking for reliable batteries the LG He2's and Samsung 25r's are good alternatives to the VTC4/5's. I was scared too! But as long as your safe you should be fine, use http://www.steam-engine.org/ for your builds and it'll vastly help you out My fear is now gone and I'm down around .25-.28 but i'd like to think I have a general idea of what I'm doing. As with anything, be safe, go slow, and welcome to the forum!

Also dug this up:

"Here's the test (http://i.imgur.com/BNTBMZk.jpg) of the 38 amp performing absolutely abysmally. Retaining about 1700mAh of it's supposed 2600mAh at 38 amps. At 40 amps, the battery takes a crap and has a usable capacity of 400-500mAh."

 

[chockfullofmoxie]

I used the link and filled in the Voltage and Current. 3.7 V 38 A and it said I should be fine at .1. The guys at the B+M I went to said I could go down to .2 After a day I should be at ease with this build. if I would like and I'd be fine. I think after this coil gets mucked up I'll go back to a .7 build. I like clouds and everything but I'm not exactly a chaser, and at .5 ohms juice is just flying out of my bottles!

 

[novamatt]

That battery is pretty well known for having, well... let's just say "wishful thinking" in the published specs. According to many reputable testers, it's actually a 20A battery. Pretend you never heard that 38A number - it's a 20A battery.

With that in mind, let's look at the numbers again. Since you want about 20% headroom as BlackHazard suggests, that means you can run up to 16A through it. You want to do your math using the full voltage of a freshly charged battery, because that's why you'll pull the highest current. So at 4.2v, a 0.26 ohm build will pull 16 amps. That's the number you want to look at - don't build it below 0.26 ohms, and you're relatively safe. I'd target 0.3 or higher for your coil builds so you don't have to go back and wrap a new coil if you miss it by a hair.