Fresh Samsung 25R & VTC5 reading 3.15 on Inline Voltometer?

[Apec]

I bought an Inline Voltometer to test bat's. So i have a .13 build on my Mutation. On my tub mod I am getting 3.1-3.15 volts. I understand with lower build I have more voltage drop, but .6v? Thats huge. I'd have better wattage if I build at .5 and get virtualy no loss. My Atlantis reads 3.6-3.7 with the same setup.

Has anyone experienced this or can maybe fill me in? I feel like something is not right, but I have fresh VTC 3,4,5 and Samsung 25R, and they read 3.7 on my Atlantis. Thanks

 

[Apec]

*Update

So i put the new 25R's on my buddies Dimitri Clone (parallel 18650 box mod), and it read 3.5-3.58, so it looks like my Panzer is just a POS....which I already kinda knew.

 

[bussdriver]

Now you see the problem with sub-ohm setups. Let's assume you atty is .13 ohms. For the sake of argument, let's also assume your mod has .13 ohms of resistance due to the switch, threads, connector, pin, on and on. You battery sees .26 ohms; .13 for the mod, and .13 for the atty. In this case, half of the delivered power (watts) is dissipated in the mod, and half in the atomizer coil. Quite a waste.

On the other hand, raise the atomizer resistance. Let's assume the atomizer resistance is 1.3 ohms, and the mod resistance is still .13 ohms. Now in this case, the atomizer coil will see 10 times the power dissipation as the mod. That makes is MUCH more efficient. In the first example, the battery usage is only 50% efficient. This is one of the reasons as you go lower and lower in coil resistance, the more inefficient the whole setup becomes and it is a real drain on the batteries !

For best battery usage/efficiency, a higher atomizer resistance is better. That's more than likely what you're seeing in the above example. Even if you have to boost the voltage at a 93% efficiency with a regulated mod, this is often better than the lost that occurs in the mod with a super-low resistance one.

 

[DaveSignal]

Dimitri is a dual 18650 mod. Some of that voltage drop is due to the batteries themselves, not the mod. With dual batteries in parallel, each battery shares half the load, so you get better voltage drop. It would be even better yet if you had 3 batteries in parallel. The dimitri is a great mod, though.

ETA: I get around 3.7 with a 0.1 build on my triple 18650 box. Its about 3.75 with new freshly charged batteries. It will drop, though, if I run it with 2 batteries. And drop more if only a single battery. .1 is going to pull a huge amount of amps for one 18650. Its not really safe.

 

[Froth]

It's quite simple, you're losing voltage somewhere in the mod. With my SMPL mods and a 0.12 ohm coil and a fresh 25R I get a reading of right around 3.60V under load measured at the posts, so you're losing nearly half a volt with the Panzer from my experiences. I've got a copper Panzer clone that actually performs really well, the issue is there are six different manufacturers who all have different ideas of how the Panzer should have been cloned and they all seemed to do it differently.