3000mAh - 18650 vs 20700

[deadhorizon]

So I think I already know the answer to this, but I figure I better validate it before pulling the trigger on a new mod purchase...

Will there be any difference in battery capacity (i.e. how long it lasts) between a 3000mAh 15A 18650 and a 3000mAh 30A 20700?

Basically I'm choosing between the RX GEN3 and RX2 20700, and I'm wondering if the extra amps in the 20700 will somewhat make up for the lack of a third battery?

 

[bombastinator]

They will to a degree in that you will be able to vape at a higher wattage than you could otherwise. 2 30s will support a higher total amp output than 3 15s. The total amperage will be lower though so the batteries will run out faster. This only matters if you vape at very high wattage though. It wouldn’t make a whit of difference to my vaping for example. What wattage are you hoping to vape at?

 

[deadhorizon]

They will to a degree in that you will be able to vape at a higher wattage than you could otherwise. 2 30s will support a higher total amp output than 3 15s. The total amperage will be lower though so the batteries will run out faster. This only matters if you vape at very high wattage though. It wouldn’t make a whit of difference to my vaping for example. What wattage are you hoping to vape at?

I generally don't go much higher than 60w (3.7v)... would it make a difference in my situation?

 

[bombastinator]

I generally don't go much higher than 60w (3.7v)... would it make a difference in my situation?

Yep. You don’t need 3amp draw batteries. The higher amp draw ability won’t help you.

 

[untar]

Mooch hasn't put out his Wh ratings for batteries yet but I suspect, just by looking at eg ijoy 20700 vs vtc6a CDR curves, the 20700 are going to give you an overall better performance.

 

[bombastinator]

Mooch hasn't put out his Wh ratings for batteries yet but I suspect, just by looking at eg ijoy 20700 vs vtc6a CDR curves, the 20700 are going to give you an overall better performance.

Hmm.. I didn’t look at the curves. @untar May have it here

 

[deadhorizon]

Yep. You don’t need 3amp draw batteries. The higher amp draw ability won’t help you.

Ah okay that's what I thought. I'll keep an eye out for some of the higher mAh 20700's if I do end up going with the RX2. Thanks man.

 

[deadhorizon]

Mooch hasn't put out his Wh ratings for batteries yet but I suspect, just by looking at eg ijoy 20700 vs vtc6a CDR curves, the 20700 are going to give you an overall better performance.

Hmm, better performance as in longer operating time, or longer overall lifespan?

 

[untar]

Longer operating time. If you look at both CDR test graphs at loads between 10A and 20A
iJoy 40A 3000mAh 20700 Bench Test Results...overrated but a good 30A battery
Bench Retest Results: Sony VTC6 15A 3000mAh 18650…a fantastic 15A/20A battery!
the 20700 one is consistently higher, which means higher voltage over the usable capacity, so longer until it hits the ominous 3.2V. The curve is more "bulged towards the top" which will give it a better Wh rating as soon as they come out.

 

[puffon]

I'll wait till the VTC6a comes out, before buying new batteries.
Fits my needs better than the current 2x700s available.
Bench Test Results: Sony VTC6A 18650 Samples...beats VTC5A, estimated 2900-3000mAh, 20-25A

 

[untar]

Look at where the 10A and 20A curves intersect the 3.2V horizontal line and compare the mAh reading on the x-Axis.

 

[bombastinator]

Longer operating time. If you look at both CDR test graphs at loads between 10A and 20A
iJoy 40A 3000mAh 20700 Bench Test Results...overrated but a good 30A battery
Bench Retest Results: Sony VTC6 15A 3000mAh 18650…a fantastic 15A/20A battery!
the 20700 one is consistently higher, which means higher voltage over the usable capacity, so longer until it hits the ominous 3.2V. The curve is more "bulged towards the top" which will give it a better Wh rating as soon as they come out.

Are you taking into account that he would have 3x18650 rather than 2x20700? It needs to be a pretty big bulge

 

[untar]

Are you taking into account that he would have 3x18650

Nope, yer got me there, sir. I just compared 1v1 (or 2v2 etc).

 

[bombastinator]

Nope, yer got me there, sir. I just compared 1v1 (or 2v2 etc).

Hmm. So I guess the final is that the 3 battery mod is going to have more total oomph than the 2 battery mod even if the 2 battery mod is a 20700 mod. It’s surprisingly close though.