Battery Voltages -- Surprise!

[Scottbee]

Excellent, Scottbee...thanks for this!! I just barely know Ohms from Mah (or at least I think I know LOL), so all of this is kind of greek to me. BUT, I just put my 510 atty on one of my Kr8 mega batteries and it performed exactly like it does on my Protege! Great discovery!! No more 510 batteries for me...and I can get the Kr8 megas from Heaven Gifts at an excellent price.

Bingo! There ya go!

 

[jedrojam]

Very thorough research. I know this took a lot of time, and I just wanted to say thanks for your effort.

 

[h8isgr8]

While I appreciate your test. It doesn't come anywhere near explaining the Kanger vs Mega, eGo, or PT results.... does it?

No, your right; there is something else going on with those batteries.

Either they have sorely over-rated battery specs, really low quality li-ion cells, or wonky circuitry inside. No way to tell without hacking one up.

As far as the passthroughs go, you eluded to it yourself. They have really poor wire quality which leads to excessive voltage drop.

 

[Scottbee]

I'm voting for wonky circuitry ( ) and I have a funny feeling I know why they "wonked" them.

I'll be pulling one apart in the near future and I'll reverse engineer the circuit. I don't think that's been done on ECF yet.. if I'm wrong, I'm hoping somebody will save my time and point me to it!

 

[5cardstud]

I ran my multimeter about a week ago out of curiosity because I wanted to know. Your correct about higher voltages being better. It's so much harder for me to get a good vape with 510 batteries than it is the passthrough which runs higher voltage than the battery. I use my passthrough almost always as a result. I have some big batteries/charger on the way. Great post, Thanks

 

[danielwd]

Excellent, Scottbee...thanks for this!! I just barely know Ohms from Mah (or at least I think I know LOL), so all of this is kind of greek to me. BUT, I just put my 510 atty on one of my Kr8 mega batteries and it performed exactly like it does on my Protege! Great discovery!! No more 510 batteries for me...and I can get the Kr8 megas from Heaven Gifts at an excellent price.

Do you need an adaptor to run a Kr8 batt to a 510 atomizer? And if so, it would follow that a 510 charging device, such as say a PCC, would not fit the Kr8 batteries. Basically devices that charge 510 batteries would not charge Kr8 batteries. Am I correct with these assumptions?

 

[dolvey]

Interesting post. When an atty gets sluggish I found that putting it on for a round of vapes on my 5v PT the attys wake back up. I believe that what tends to make attys squirrely at times is that during voltage drop at the end of a charge on a battery the wattage drops so low that juice is not fully disipated and gums the atty.

 

[Scottbee]

Interesting post. When an atty gets sluggish I found that putting it on for a round of vapes on my 5v PT the attys wake back up. I believe that what tends to make attys squirrely at times is that during voltage drop at the end of a charge on a battery the wattage drops so low that juice is not fully disipated and gums the atty.

I'm inclined to agree with you on that. Ramping the voltage up just .5-.6V appears to have "cleaned up" some of my atties...

 

[h8isgr8]

I'm voting for wonky circuitry ( ) and I have a funny feeling I know why they "wonked" them.

That's why I asked earlier if you measured the unloaded voltage of any of those batteries.

I have some that measure ~3.8V fully charged, which is 0.4V less than what they should be. I'm sure it has something to do with the internal circuit design; intentional or not.

 

[CJsKee]

Do you need an adaptor to run a Kr8 batt to a 510 atomizer? And if so, it would follow that a 510 charging device, such as say a PCC, would not fit the Kr8 batteries. Basically devices that charge 510 batteries would not charge Kr8 batteries. Am I correct with these assumptions?

Like I said, daniel, I just barely know my ... from a hole in the ground when it comes to this kind of thing I do have the 901/Kr8 to 510 adapter. It works great; BUT...I don't think I would try to use it to charge the Kr8 battery with a 510 charger. If Scottbee or someone else thinks different, they can certainly advise you better than me

 

[jlmanno]

Nice work Scottbee very interesting info!

 

[eGeek]

This is great info Scottbee and very relevant, thank you. It does explain a lot of performance differences and preferences.

Could a Moderator please sticky this thread so it doesn't fall into the abyss.

 

[voltaire]

Scottbee, do you remember the source of the Kr8 bettery you used for testing? Even before this, I was already preparing to get some for the higher mAh, (280 standard & 380 mega, I believe) and I already have the adapter. Now I just want to make sure I get the ones that produce the better voltage. Maybe they all do, but I'd rather just be sure and get the kind you tested.

Thanks for the great info!

 

[son et lumiere]

Good info. Good to know.

 

[Cielo]

I'm voting for wonky circuitry ( ) and I have a funny feeling I know why they "wonked" them.

I'll be pulling one apart in the near future and I'll reverse engineer the circuit. I don't think that's been done on ECF yet.. if I'm wrong, I'm hoping somebody will save my time and point me to it!

Adrenalynn took some close up pics of the V4L kr8 auto battery found here:
http://www.e-cigarette-forum.com/forum/vapor4life/64879-battery-disassembly-image-intensive.html

 

[h8isgr8]

Another observation/connection I've made is that some batteries have internal charge control (however crude it may be), and others have the charge control built into the charger/supply.

For example, the KR808-Dx and M40x need an external charge control, which is built into their chargers. Others, like the 501 and some super-mini's only require a standard 5V supply.

Also, the ones that only require a simple 5V supply for charging are also the ones that only read ~3.8V when fully charged.

 

[AnglVapin]

Kanger is the manufacturer of genuine KR808D-1 batteries. The "KR" designates a Kanger model.

I don't know if there are any non-Kanger knock-offs out there or not.

Very interesting information!

So, I wasn't exactly crazy when I thought my 901 atty on a KR808D-1 was a much better vape!

Thanks for the info. I was about to buy some "Tornados," but you just changed my mind.

 

[WillyB]

Willy,

Your post makes an interesting point.. which makes for an interesting question. Which... made me run another test (sorry, no pictures, you'll just have to trust me!).

When the handpiece of my Joye PT is delivering ~3.1V to the atty, the voltage of the in-line battery reads a solid 3.95V on my meter...

Now you got me thinking again. It seems that the PT is juicing the inline battery a bit. I wonder what loaded voltage you'll get out of the Bartleby when it is USB connected?

On a side note on my KR mega it's a bit of a pain to press the barely protruding button, gotta squeeze pretty hard... you too?

 

[Nuck]

So anyone have any guesses why the Kanger batteries discharge is that much higher? Are they using standard Li-ion or a different chemistry?

 

[Ralph Hilton]

With fresh batteries measuring 4.20 volts unloaded I get 3.87 volts volts loaded with a 14500 and 3.94 with an 18650 (510 atty). I did checks with a 510 passthrough some time back. It drops around half a volt in the wires from the battery to the atty. I doubt if the FET is dropping a lot of voltage - I have used small FETs in a couple of my mods and measure the drop as 0.04 volts.