Stuck on my noob research, suggestions?

[Vapoor eyes er]

When I was researching batts found my way to the flashlight forum and they had performance charts. As wv2win has stated performance of batts at 50% drop off a cliff. My batts last for 24 hrs but I recharge after 16 hrs of use on single coils. Better not to allow batts to fully drain and they'll last longer IMO.
On dual coils 100 mah only = 1/2 hr vaping.

And actually the FL Guys found some batts were far superior to others but I'm not going there

 

[markfm]

V = voltage, the output of a battery. R = resistance of the cartomizer or atomizer.

I = the current drawn by the atomizer/cartomizer. I = V/R (Ohm's Law)

A battery is a constant voltage device (not really, but close). Put a resistor across its terminals and the resistor will draw as much current out of the battery as needed so that the voltage drop across the resistor = the battery voltage.

Battery capacity, mAh, milliamp hours, is the total quantity of current that the battery can deliver. A 380 mAh battery could drive 380 mA for one hour before being discharged. A higher mAh rating means longer vaping time compared to a smaller mAh. When running a PV, the current draw (mA) is almost always larger than the capacity (mAh) -- our little PV batteries are typically pushing out 1.5 - 2 amps, but would not maintain that output for a full hour before needing a recharge. You can think of it mAh as being like how many gallons of water a barrel can hold, while the current, the amps, is like how fast the water is flowing out a hole in the barrel, the gallons-per-minute.

Power, P = VxI = VxV/R, measured in Watts. More power = hotter, more "hit", more vapor production, often more flavor (though if you go too high the eliquid may lose some flavor or have a burnt taste).

If you have a higher voltage, then you have higher power for a given resistance. Conversely, for a given desired power, the higher voltage device generally gives longer run time, since the current draw is lower.

Two batteries, KR808D-1 at 3.8V, 510 at 3.3V. Take a 2.5 ohm cartomizer.
Power: 3.8x3.8/2.5 = 5.8W for the 808, while 3.3x3.3/2.5 = 4.4W for the 510. The 510 will be noticeably cooler.

Say you want the 5.8W on a 510, what does it take? 5.8 = 3.3x3.3/R. R= 1.9 ohms.

What's the current look like? 808: 5.8 = 3.8xI, I = 1.5A. 510: 5.8 = 3.3xI, I = 1.8A. The 510 battery has to supply 20% more amperes than the 808 battery to get the given power level. Even if the batteries have the same mAh, the 510 battery is draining, using up the mAh, faster than the 808 battery.

Hopefully the above helps

 

[swedishfish]

smartypants.

 

[musekill]

Markfm - you are awesome. Will take a closer read of that when I get home from work.

 

[stephpd]

markfm gave a great 'technical' explanation of electricity.

I'll add my 2cents and try and usefar less technical words and discriptions though I'll still have to use many of these same words.

Batteries are always rated in mAh. The votage is fairly constant. But different batteries have different voltages. The slim 510 batteries are ~3.3 volts the 808's at 3.7 (fatter 510's are also ~3.7 volts)

Next is resistance. Cartomizers and atomizers are rated by their resistance. Lower resistance means a higher current draw on the battery. For E-cigs that' usually translates into more vapor and more throat hit as the resistance gets lower. But at a cost of shorter battery life between charges.

Current is a limiting factor for many of these batteries. They can only deliver so much before overheating the internal circuitry. Hold the button too long and it gets very warm. Some have built in protection so that you can't get but maybe 5 second before it shuts off. Or so many seconds a minute and others will shut down. (to cool down).

This isn't so much a problem with the larger batteries. Ones like the newer Ego/Kgo/Rivas start at 650 mAh and the longer ones up to 1050 mAh. They are also at 3.7 volts and can handle lower ohm cartos/atty's without overheating as much.

But there's always a limit on how low you can go in resistance before hurting a battery with built in overload protection. To much current draw heats up all the internals of a battery and it's little circuit board. Have a carto short out and you'll kill a battery quick. To low a resistance cartomizer on a small battery will shorten the life of the battery.(less recharges), if it doesn't overheat the circuits.

That's also why it's dangerous to use unprotected batteries when vaping. Use to low a resistance carto, vape to long (frequent) and they can overheat the battery and blow up in your face. The circuits in these protect against that. But not so in many mods. Higher voltages, low resistance and heavy vaping can blow those up fairly easily.


Hope that helps some.

 

[wv2win]

When I was researching batts found my way to the flashlight forum and they had performance charts. As wv2win has stated performance of batts at 50% drop off a cliff. My batts last for 24 hrs but I recharge after 16 hrs of use on single coils. Better not to allow batts to fully drain and they'll last longer IMO.
On dual coils 100 mah only = 1/2 hr vaping.

And actually the FL Guys found some batts were far superior to others but I'm not going there

Good explanation. mAh is length of time on a charge where as volts measures power or heat generation. Many of us prefer a good 5 volt model or variable volt model over any 3.4 or 3.7 volt model because they produce warmer vapor and better simulate the real thing.

 

[markfm]

Nice explanation

 

[Vapoor eyes er]

And I thought I had headaches when I first began vaping Thanks to all for a very detailed explanation of batts.

 

[Myriad Dark]

Welcome musekill and congratulations on looking into the wonderful world of vapeing. As a recent convert from analogues I found myself looking for a lot of the same things you say you're looking for. These forums are a great place to do some research and find answers to any questions you may have. Last week I pulled the trigger and ordered a 510 PCC kit to replace the "kit that shall not be named" (it was a gift) and couldn't be happier. I was kind of leaning towards an eGo because of the longer battery life, but it didn't sound like it was going to be the transition that would work for me at this point. I love the kit I ordered because the PCC is almost the exact same size as my old analogues and holds two 510 manual batteries and 6 cartos which gets me through the day with no issues. I did order a spare battery just to be safe and am glad I did because a fully assembled batt and carto will not fit in the PCC, but it's not a problem because I usually have one out at all times anyways. I was leaning towards automatic batteries, but I am so glad I went with the manuals and will never go back. There are some great sales going on right now which can be found in the deals and steals section and somebody posted in there that Dark City Vapor has the same kit I went with for $25 which has me thinking about ordering a spare. Hope you find the setup that will work best for you.

 

[Retriever]

Congratulations and welcome to ECF! You have received some really good advice. I used a Volt to get off of cigs and it worked flawlessly. But a lot of people like to start out with an Ego or other 510 device. Whatever you choose, it should do the trick. Enjoy!