510 Box Mod, Parallel, Serial or 5v advice please.

[Harpz]

I recently built my first 510 box mod following the guide here: Simple 2xAA Boxmod with Bi-colour LED - Modipedia it went really well and I'm enjoying the mod, nice and small. The vape can be a little week sometimes but i thinks that's more my coils then the mod as its similar with my eGo batteries.

The only main gripe I have about the mod is the battery doesnt seem to last me all day, I use it with my vivi mini nova with a 2.2-2.4 ohm coil and I seem to get just over half a day out of it which got me thinking about my next project

I was thinking of using 3xAA White Battery Box with Switch and Cover and doing the same as I did with the first mod but this time just have 2 batteries in Parallel, thus doubling the current and getting me through the day, that was until I came across 5v mods.

Ideally i want to stay with the 14500 batteries If I can as I have only just got 4 of them but now Im not sure which root to go down, parallel or 5 volts.

Any advice you pro's can give me to get me thought the day and which type of mod would be better would be appreciated. advice

 

[Skyfntm]

I would say parallel with the 14500's. And carry the other two with you just in case. A friend of mine put 2 ego 650mah lipo batteries in an altoids smalls can. He is vaping all day on it.

 

[Harpz]

Do you think if I made the 5v mod would that last allday, I only ask as the value on the mid starts great but seems to drop off after a while. Maybe I just hit it hard.

My 1100mah ego battery used to last all day but is on its way out, so the thought of 1600mah is appealing and should let all day

Sent from my GT-I9100 using Tapatalk

 

[Skyfntm]

Do you think if I made the 5v mod would that last allday, I only ask as the value on the mid starts great but seems to drop off after a while. Maybe I just hit it hard.

My 1100mah ego battery used to last all day but is on its way out, so the thought of 1600mah is appealing and should let all day

Sent from my GT-I9100 using Tapatalk

Yea the 1600 mah should last you just dandy. And the best part is you have to more as a backup. The 5v mod runs off of AA batteries if I'm not mistaken. If you used the 14500 like that it would be 14v mod. I thin you would be happy with the 3.7v 1600mah that the 14500's will provide. Make both!! Never know till you try!!

 

[Harpz]

Yea the 1600 mah should last you just dandy. And the best part is you have to more as a backup. The 5v mod runs off of AA batteries if I'm not mistaken. If you used the 14500 like that it would be 14v mod. I thin you would be happy with the 3.7v 1600mah that the 14500's will provide. Make both!! Never know till you try!!

Think i may have to build both to see which i prefer, the 5v mod would run off 2x 14500 but how did you get to 14v, I may be understanding something wrong here.

If I was to build the 5v box mod, what parts would i need, is there a how to somewhere i could look at, i can follow a circuit diagram but its been a while .

I usually vape at around 4v with a 2.2-2.4ohm coil, I take it i would have to up my coil resistance otherwise i would burn the juice, if i was to do this how would it affect the battery life?

 

[Skyfntm]

I'm sure someone will correct me if I'm wrong, but if you run 2x14500's in series that would give you 7.4v, 14500's are 3.7 volt batteries and you would still only have the 600 or 700mah that your battery is. Series doubles your voltage where parallel soulless your mah.

I beleave there is a mod they call the "puck" which is a 5v mod that takes 4xAA batteries is series. I think AA are 1.2 volts. But as far as the puck goes, I really don't know what I'm talking about lol. I looked at a picture of it to see if I wanted to build one but it was far too big for my liking so I never looked further into it.

If you have a link to where you saw this 5v mod so that I better understand it I would appreciate it.

 

[LucentShadow]

Putting two cells in series or parallel theoretically gives you double the watt-hours (the truly useful way of measuring performance) of a single cell. Series doubles the voltage, parallel doubles the amp-hours. Watt-hours is the product of those two measurements. They both achieve the same number in different ways.

Running a 2.3 ohm coil on a 3.7v setup pulls about 1.6 amps, or about 6 watts, on average. Using the same coil on a regulated 5v setup pulls about 2.2 amps, or almost 11 watts. In this case, the 5v mod would 'hit harder', and likely drain as fast, or faster, than the single cell, because most 5v dc out converters aren't very efficient. Parallel cells would double the charge life and give the original vape, maybe with a bit less voltage sag under load, as they split the burden.

You'd have to use a 4.2 ohm coil on the 5v mod to get the watts down to the level of the 3.7v setup, and it would likely still not achieve as much longevity between charges, because of the dc converter losses.

So, if you just want longer time between charges, with the added benefit of less strain on the cells, parallel would definitely be more useful. In either case, it'd be wise to learn best practices for using multiple lithium cells, and keep them paired and monitored well.