Acceptable Voltage Drop

[tctom]

Hi Everyone-
A couple of days ago I finished a Blue Lexan box with parallel 18650's - one blue LED - and a voltage meter. With no atomizer - the unit shows 4.1 to 4.2 volts with fresh charged batteries. Attaching my Tobh 22mm with a 0.41 Ohm build - I am seeing a voltage drop of almost .6 volts. Question to anyone (or everyone), "Is this an acceptable amount of voltage drop?" All wires (except for what came attached to the voltage meter & pre-wired LED) are 18 gauge solid.

 

[newt2351]

Do you happen to know the spec of your'e battery ie its internal resistance might be able to do some math to see if thats whats expected

 

[DaveSignal]

The lower the resistance of your atomizer, the higher the voltage drop. Most reviewers do drop tests with a 1 ohm coil.

ETA: The numbers in themselves are less important. You need to compare with another mod using the same battery and same atomizer.

 

[Visus]

Take the led out the circuit, it will increase your drop as voltage falls from 4.2v..

It really needs to be powered with a ldo, I get about an hour+ more vape time after taking mine out the vape circuit.

 

[rhelton]

Sounds like you built a nice mod, I would not worry about gaining a .10 of volt its not going to change your vape experience that much. If you want more power you have the box and batteries already it wont cost much more to put a 60w raptor in their they are under 9 bucks plus a couple resistors and a pot. The battery life is pretty incredible with that set up. Having them in series they dont have to work as hard to carry the load. I vape at 5 volts on .60 ohm dual coil and still get 12 to 14 hours on a set of battery's. You wont be disapointed.

 

[tctom]

Thanks for the input y'all - BTW the batteries are Purple eFest 35a - 2500Mah. I don't plan to change anything - this was my first MOD with a voltage meter so I was just wondering if .6 volt drop was normal or not. I alternate between 4 box mods (all my own) most days and do battery swaps on all once a day. Three are parallel 18650 and one is parallel 26650. Someday I will have to take some pics and post. I am waiting on some stuff for my next two projects - a bigger box DNA and perhaps for the other, something powered by a 2s RC Battery (7.4v). Thanks for the comments everyone - Have a Vaping Groovy Day!!!

 

[newt2351]

Hia tctom, thinking 4.2v / 0.42 ohm =10amp looking at this chart:- Test/Review of Efest IMR18650 2500mAh (Purple) 2014

on first graph the 10amp line dips about 0.5 ish of a volt on fire up, so i would say yes this is totally acceptable