What voltage drop would you consider acceptable?

[fourtytwo]

I am building a pure mech at this time and was wondering what level of voltage drop would you consider acceptable.
The device will be constructed of brass, copper and other materials and I am considering building the 510 connector and switch from scratch.

 

[studiovap]

I am building a pure mech at this time and was wondering what level of voltage drop would you consider acceptable.
The device will be constructed of brass, copper and other materials and I am considering building the 510 connector and switch from scratch.

Hi mate, next to none, there is no reason you should have any voltage drop unloaded. When you put a low res coil on it that is another question. This is when the boys get separated from the men. Once you get below 0.9 ohms down to 0.65 ohms this is really when small differences really show up IMO.
I have modded many Chinese Meachanicals and do all my testing of voltage under load between the positive terminal of the atty and the ground of the battery tube. To give you an example the sigelei #19 in standard form gives next to no (0.02) voltage drop unloaded, but with a 0.7ohm coil on and RSST you only get around 3.55v under load (with a fully charged but well used AW 18350). After modding switch and 510 connection and removing magnets I now get around 3.75v with the same coil.
So what this is highlighting is its about the current it will cleanly carry under load that matters and all other tests mean very little again IMHO. Good luck with your build

 

[BuzzKilla]

After modding switch and 510 connection and removing magnets I now get around 3.75v with the same coil.

dude.... that's a big drop!
i get 4.0v at the screws (coil connections) of the RSST, on a fresh battery. Under the same conditions....

but your point is still valid, minimal voltage drop under load is what makes a well performing mod...

 

[studiovap]

dude.... that's a big drop!
i get 4.0v at the screws (coil connections) of the RSST, on a fresh battery. Under the same conditions....

but your point is still valid, minimal voltage drop under load is what makes a well performing mod...

With a 0.7 ohm coil and an Aw18350? Really? One of us need a new meter.

 

[BuzzKilla]

I have two meters that give the same result, so yes one of us does need a new meter, or a new mod

I must admit though, i run my mech, with no 510 connector up top, i have a M20x1 to M7x0.5 "brass thread reducer" to run it as a hybrid. Rsst center post, contacts the battery positive directly....

so maybe thats where the lack of drop comes from

 

[DuffTime]

I have two meters that give the same result, so yes one of us does need a new meter, or a new mod

I must admit though, i run my mech, with no 510 connector up top, i have a M20x1 to M7x0.5 "brass thread reducer" to run it as a hybrid. Rsst center post, contacts the battery positive directly....

so maybe thats where the lack of drop comes from

You ought to make a thread as to how that's done.. just ordered a Sigelei 19 and would love that performance and that look!

 

[BuzzKilla]

You ought to make a thread as to how that's done.. just ordered a Sigelei 19 and would love that performance and that look!

Post #126 in the "AGA-T/Paps Hybrid easy as pie" Thread

i used parts from the original AGA-T, but a generous user from another forum made me one from brass stock.

I then screwed down the centre post of the RSST until it touched the battery positive... which only needed to extend about another 2mm, so the functionality of the spring post was un-affected.

I dont know what the performance gain would be on a Sigelie be as i don't have any to test. But let us know your results.
hope that helps


There is a lot of info in that thread, that shows many ways to achieve the "hybrid" look. I just took my own path.

 

[studiovap]

I have two meters that give the same result, so yes one of us does need a new meter, or a new mod

I must admit though, i run my mech, with no 510 connector up top, i have a M20x1 to M7x0.5 "brass thread reducer" to run it as a hybrid. Rsst center post, contacts the battery positive directly....

so maybe thats where the lack of drop comes from

Well mate, after buying a new multimeter, and fitting mini croc clips, knowing my mods are not the issue, I got the same bloody readings
But found the problem, tired out AW18350s. Too many dry burns and experimental setups I expect.
With one of my newer 18350s I gained nearl 0.3 of a volt under load vs the tired ones.

 

[BuzzKilla]

yes, a tired battery could possibly do that.
on the plus side...you modded mod kicks some clouds

 

[dr g]

Hi mate, next to none, there is no reason you should have any voltage drop unloaded. When you put a low res coil on it that is another question. This is when the boys get separated from the men. Once you get below 0.9 ohms down to 0.65 ohms this is really when small differences really show up IMO.
I have modded many Chinese Meachanicals and do all my testing of voltage under load between the positive terminal of the atty and the ground of the battery tube. To give you an example the Sigelei #19 in standard form gives next to no (0.02) voltage drop unloaded, but with a 0.7ohm coil on and RSST you only get around 3.55v under load (with a fully charged but well used AW 18350). After modding switch and 510 connection and removing magnets I now get around 3.75v with the same coil.
So what this is highlighting is its about the current it will cleanly carry under load that matters and all other tests mean very little again IMHO. Good luck with your build

What is "unloaded voltage drop"? That seems like a contradiction in terms.

 

[studiovap]

What is "unloaded voltage drop"? That seems like a contradiction in terms.

Unloaded means without a load attached eg. a 0.8Ohm coil or any atomizer. The unloaded voltage drop is the voltage lost to the resistance of the battery device alone.

 

[dr g]

Unloaded means without a load attached eg. a 0.8Ohm coil or any atomizer. The unloaded voltage drop is the voltage lost to the resistance of the battery device alone.

How do you measure that?

 

[studiovap]

How do you measure that?

Measure voltage of freshly charged battery from battery contacts,then install fresh battery in device, connect meter to center pin and ground/body of device and press button/switch of device.

 

[dr g]

Measure voltage of freshly charged battery from battery contacts,then install fresh battery in device, connect meter to center pin and ground/body of device and press button/switch of device.

Ah okay. Is this ever significant?