lost on battery life calculations...

[obscure_shadow]

ok so im waiting for my mech mod to come in, rda and the like, yay vape mail! and i ordered 2 sony 18650 2600mah vtc5 batteries. been reading a whole lot trying to wrap my head around the elctronics and what not i feel like i have a pretty good handle on it without having gotten the chance to experiment on my own but the question is this...

right now, im using a ego 900mah with an evod and 1.8 ohm coils. this usually lasts me a day or two, maybe more if it's a light vaping day...

most of the people i have talked to and threads i have read say that their mech mod batteries dont last as long before they start to drop off, couple of hours or needing 2 or 3 batteries to get through the day, but they are also doing sub ohm coils and y'a know, going rda crazy with their quad dragon nano...

so the question one is this. if i build a 1.8 coil on an rda, and vape at my normal usage rate, can i expect the battery to last as long or longer than my 900mah ego battery? (of course keeping track of the charge and stopping at a safe level for the battery)

question 2, if i were to make a 2 coil build, that was still at 1.8 ohms, would the battery (in theory) last the same amount of time?


i'd like to make it through the weekend at a festival with no power, am i looking at buing more batteries? (will still have the evod for backup but will i need it?)

ps sorry if this has been covered but i did a lot of searching.. and a little math.. and i didnt know what terms to use to not be talking about how many charge cycles a battery can go thru..

does 2600mah cover the acceptable discharge or is it 2600 mah to full discharge? so looking at 9.62w hours... so at 3.7v (guessing this is close to what it is under load) x 1.8 ohm = 7.6w 9.62/7.6=1.3 hrs (course im not gonna fire it for 1.3hrs straight, is my math right here?)

same numbers for ego 900mah... 3.7v (regulated) = 3.3wh x1.8 ohm =7.6w 3.3/7.6=.43 hrs should last more than twice as long if i keep it at a 1.8 build? am i missing something here?

 

[ScottChensoda]

Thinking that deep and all that calculating could fracture a man's skull from the inside if'n he wasn't careful young Mr Shadow. Maths is fine but it is a very approximate guide due to the many variables involved.

The first and most important thing to consider is no matter what, you do not want get anywhere near to running out and perhaps resort to buying a pack of cancer sticks to tide you over or else suffering deep withdrawal symptoms until you get home.

As you are yet to receive your goodies you should be prepared for a bit of a culture shock when you start vaping a mech/dripper as opposed to an eGo/evod setup. It is quite normal to drop down at least one level in your juice nicotine content, maybe two, because the bite (flavour and throat hit) is initially quite severe.

From what you say, it appears that you are a light to medium vaper and although you will find your juice consumption will probably increase by quite some margin once you adapt to the new combo, taking 20ml to a two-day festival should do you fine. I'm a serious chain vaper and I hardly use 10ml per day.

The batteries remain an unknown quantity as far as I see and personally I would have chosen the purple Efest 35A 2500 mAh as mine last me just under two days of serious use. I think it maybe an idea if you purchase certainly at least one more battery if not a pair, plus a battery case of course, just to be ultra-safe but I think the Sony's will do you fine.

Enjoy the festival and your new vape. ATB.

 

[Baditude]

Always have a backup vaping device.

You'll find that a rebuildable juice attachment will drain batteries faster than commercial juice attachments. You'll also likely go through juice at a faster rate. You'll possibly need to drop a level of nicotine concentration. (12 to 6 mg, for instance.)

I wouldn't put a rebuildable juice attachment on an eGo battery. Bring a clearomizer, cartomizer, or whatever commercial attachment you have been using on it.

If you are brand new to rebuildables, there could be a steep learning curve until you gain experience and more knowledge. Your new rebuildable may seem fussy and undependable initially; so at a festival setting I'd highly recommend a more dependable and reliable juice attachment.

 

[obscure_shadow]

right, backup check. more juice than i could possibly need, check, been vaping 2 years and probably 10 3 and 4 day festivals, analogs are not going to be a temptation weather or not i can even get the damn thing working...

was just wandering if i was going to be only able to use it on the first night lol and more interested in theory i guess haha.

in theory, should the same ohms last the same amount or more time than on the 900, even though it's bigger coils and vaping more juice i guess the question is to be more to the point...

thanks for the replies

also scott, im just nerdin out, not nearing levels of cranial damage with my calculations haha if i wasn't having fun i wouldn't be doing them but i appreciate the concern

 

[beckdg]

ok so im waiting for my mech mod to come in, rda and the like, yay vape mail! and i ordered 2 sony 18650 2600mah vtc5 batteries. been reading a whole lot trying to wrap my head around the elctronics and what not i feel like i have a pretty good handle on it without having gotten the chance to experiment on my own but the question is this...

right now, im using a ego 900mah with an evod and 1.8 ohm coils. this usually lasts me a day or two, maybe more if it's a light vaping day...

most of the people i have talked to and threads i have read say that their mech mod batteries dont last as long before they start to drop off, couple of hours or needing 2 or 3 batteries to get through the day, but they are also doing sub ohm coils and y'a know, going rda crazy with their quad dragon nano...

so the question one is this. if i build a 1.8 coil on an rda, and vape at my normal usage rate, can i expect the battery to last as long or longer than my 900mah ego battery? (of course keeping track of the charge and stopping at a safe level for the battery)

question 2, if i were to make a 2 coil build, that was still at 1.8 ohms, would the battery (in theory) last the same amount of time?


i'd like to make it through the weekend at a festival with no power, am i looking at buing more batteries? (will still have the evod for backup but will i need it?)

ps sorry if this has been covered but i did a lot of searching.. and a little math.. and i didnt know what terms to use to not be talking about how many charge cycles a battery can go thru..

does 2600mah cover the acceptable discharge or is it 2600 mah to full discharge? so looking at 9.62w hours... so at 3.7v (guessing this is close to what it is under load) x 1.8 ohm = 7.6w 9.62/7.6=1.3 hrs (course im not gonna fire it for 1.3hrs straight, is my math right here?)

same numbers for ego 900mah... 3.7v (regulated) = 3.3wh x1.8 ohm =7.6w 3.3/7.6=.43 hrs should last more than twice as long if i keep it at a 1.8 build? am i missing something here?

no. you can expect it to teach you how long it's going to last. gauge and type of wire and coil "design" are going to play a big factor into how fast a 1.8Ω build is going to drain a certain amount of power out of a battery. they're also going to affect how long you pull on the setup for each puff which then further effects drain on the battery. then you have to factor in that the IMR batteries are going to have a substantially lower internal resistance, so they're going to allow that power to drain more freely. so, yes... you're missing something that i've not seen quantified in a way that can be calculated.

in theory, yes. in practical terms, you have to consider the entire scope of the build and how each build performs for the user. for example, say you don't drill a second air hole, but you bore the first one out. your 2 coil build will probably run hot and harsh and still produce less vapor. so you'll almost undoubtedly take shorter puffs on that one and chain puff it all day chasing satisfaction. it will likely use a substantially larger amount of energy in the same amount of time because of this.

yes, the ego does stand a good chance of lasting longer. internal resistance will play a big role. if the energy can't escape it will still be there imprisoned in its cell.

 

[obscure_shadow]

thanks. im getting a helios so it should be pretty customizable but i appreciate the reply. of course i understand another factor is that it's gonna be a new toy so im probably going to use it a whole lot more in the first days 'cause its new and shiny

next question, how do i get the postman to drop it off today instead of tomorrow? grrrrrr

i will do my best to reply later on my findings once im able to do some real world experimentation. thanks for the replies everyone!

 

[Kemosabe]

thanks. im getting a helios so it should be pretty customizable but i appreciate the reply. of course i understand another factor is that it's gonna be a new toy so im probably going to use it a whole lot more in the first days 'cause its new and shiny

next question, how do i get the postman to drop it off today instead of tomorrow? grrrrrr

i will do my best to reply later on my findings once im able to do some real world experimentation. thanks for the replies everyone!

i know your question is rhetorical, but in all seriousness- if youre package is scheduled to be delivered tomorrow, stalk your postman. ive on more than one occasion greeted my postman and kindly asked about my package if i expected it that day and didn't see him dropping it in my box. he goes back on the truck and *poof* heres my package magic, lol
i dont know if packages get sorted differently than letters or if its easier for them to deliver packages separately, but its happened to me at least 2 or 3 times. the USPS must not expect us to be so aware of when our packages should be arriving

 

[obscure_shadow]

aright update time: so i got my pretty new stingray and helios and wrapped up some coils (dual 30ga contact coils came to 1.4ohm) and was in vape heaven. vaped it a while that night used on vtc5 probably about halfway... but i was playing so chain vaping and what not... charged everything back up and hit the road in the morning. first battery lasted me most of the day and when i went to put in the second battery it stopped working... (also trying to wrap a new coil while intoxicated in the dark is a bad idea, just sayin') anyways so i was kinda like bummer dude, .... with it when i get home not gonna try to do it out in the woods... got home and messed with it one evening, and half the next day... finally got it working again, but figured out it was a problem that the positive post was a hair small and wasnt making good contact with the atty, re wired it to 4 coils at 0.7 ohms (which im not sure im liking as much as just the 2 oddly enough) and it worked fine for most of the day. till i switched batteries again. got down to the vape shop and got a connector meant to be an aiflow adjustment i belive, but its about the same size though it is a little wobbly.. this seems to fix the problem. since then i have been testing how much i can get between wetting the wick both pulls and how much voltage drop... so for the .7ohm quad i get about 10-12 pulls and loose about .1v so im guessing i can get somewhere around 1000 pulls per charge but this is probably very suggestive. though its more than i thought based on a lot of people saying they can kill a battery in 45 min or so... so i think more batteries are still in order but thats always a given...