Pass-Thru?

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cryx

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Usb chargers for cell phones or ipods, either wall or car, are typically 1A. There are 1.5A chargers available but they aren't very common yet. The ReVIVE DoubleUP is a 1.5A all-in-one wall and car charger. iPad chargers are 2.1A.

Apple's older 5W ipod/iphone wall charger won't work. Seems it's designed to cutoff when something is trying to suck more amps than it can supply, instead of just outputting max.
 

analog

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Was it something I said?
Now I'm more confused. I just looked at the usb standards for a while, and usb ports on computers should be limited to 500mA. Some rare like usb 3.0 or dedicated power ports can be more, but normal run of the mill ports are only 500mA, at least according to the standards I was reading. But PT's are supposed to work at 1500 mA off a computer? Are the ports really more powerful, or are the PT's just being under powered?
 

Gardner808

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I believe the PT is being underpowered. My evidence for this is totally anecdotal.

In the car, using my PT, I taste burnt juice/cart very quickly and am very displeased. I unscrew the carts a bit and that helps but I have now stopped using the PT in the car.

Plugged into my computer I don't usually get that much of a burnt taste and slightly unscrewing the carts usually solves that.

Overall, I am not a fan of the PT. Yes, I get clouds of vapor. Yes, I am not draining my batteries. But I feel like it is ruining my carts, even when they are topped off with juice, and I don't like the flavor.
 

lo thatch

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I believe the PT is being underpowered. My evidence for this is totally anecdotal.

In the car, using my PT, I taste burnt juice/cart very quickly and am very displeased. I unscrew the carts a bit and that helps but I have now stopped using the PT in the car.

Plugged into my computer I don't usually get that much of a burnt taste and slightly unscrewing the carts usually solves that.

Overall, I am not a fan of the PT. Yes, I get clouds of vapor. Yes, I am not draining my batteries. But I feel like it is ruining my carts, even when they are topped off with juice, and I don't like the flavor.[/Q

This is exactly my experience as well. Not using it now at all.
 

cryx

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All USB 2.0 ports must be at least .5A. The battery charging spec allows them to output .9A, and the charging port spec allows 1.8A. Apple's been putting 1A USB ports on most of their computers for quite a few years now to supply enough power to charge iPods and iPhones.

I'll risk bringing the wolves into this thread... I've been able to vape with on 2A with a 5V passthru ever since I removed the adhesive in two of my cartos. There's nothing foul or burnt tasting about it, just giant plumes of delicious vapor. I have to be careful to exhale a bit to the side so I don't fog my windshield in the morning. The only downside is it rips through juice like you wouldn't believe, but it's worth it.
 

analog

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Well, hmm, so if 5v isn't great, especially with BMF cartos, maybe even any carto, why are the PT 5v? The BMF bat/carto combo gets the highest marks from everyone that reviews it when everything works right. Why throw a wrench into that by nearly doubling the voltage?

Can I ask Leaford to "develop" a PT that is identical in spec and function to the BMF batts except for a wire coming out of the end? I'll leave the higher volt stuff to the bigger is better crowd with their atomizers and their fire extinguisher sized pvs.
 

cryx

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Passthrus are 5V because USB is 5V, but it doesn't necessarily pull 5V, because the voltage is only part of the equation. Whether it's a battery or usb, what matters the most is how much power (watts) are generated. I'll show you what a 2.6 ohm carto does on batteries and usb chargers.

With a battery, the watts(P) are determined by the known battery voltage(V) and carto resistance(R). From there you can computer the amps(I). The equations are: P = V^2 / R and I = V / R.

3.6V generates 5.0W at 1.4A (bloog battery)
4.2V generates 6.8W at 1.6A (non-bloog battery fully charged)

With a passthru, it's limited by the amps. P = I^2 * R and V = I * R. Once the voltage actually hits 5V, going higher with the amps means nothing because the carto is pulling all the amps it needs.

0.5A generates 0.7W at 1.3V (this is standard usb 2.0)
1.0A generates 2.6W at 2.6V
1.5A generates 5.9W at 3.9V
2.0A generates 10W at 5.0V (max volts are reached, more current means nothing)

So let's pull all of this together. To get the same experience on a passthru as on your battery, you need 5W. With a standard usb port generating 0.7W you aren't going to be vaping. With a 1A charger, it's going to vape fine but there's no throat hit at all because it's half as cool as on the battery. At 1.5A, you are running it hotter than a bloog battery, but cooler than a fully charged non-bloog.
 

pmos69

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Well, hmm, so if 5v isn't great, especially with BMF cartos, maybe even any carto, why are the PT 5v? The BMF bat/carto combo gets the highest marks from everyone that reviews it when everything works right. Why throw a wrench into that by nearly doubling the voltage?

Can I ask Leaford to "develop" a PT that is identical in spec and function to the BMF batts except for a wire coming out of the end? I'll leave the higher volt stuff to the bigger is better crowd with their atomizers and their fire extinguisher sized pvs.

Normal PTs are 5v simply because that is the usb voltage.

For something more like a bmf bat, try a trifecta. Not the same auto switch, but you can use them like a PT and as auto or manual.
 
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