Single vs Stacked

[onthemour]

I use efest 18350s and a 18650.
Why do I get better performance from stacking? Is it amps?

 

[soul05]

youre using 7.4v (2*3.7v) vs a single 3.7v cell

 

[garyd]

I don't believe you will notice any difference in RMS2 mode except longer battery life. In mode 1 (VV) I believe you will notice a difference and may have to adjust your settings accordingly.

 

[donesmokin]

The way I understood it performance would drop as the battery discharged in single battery mode. A single battery just can't keep up with the demand placed on it. I've already got a LavaTube that does that so I stack!

 

[awsum140]

Good old Ohm's law shows the difference. The actual power available is slightly higher, as in about a watt and a half, with stacked 18350s versus a single 18650. Plus, when using a single 18650 at higher voltages (even effective voltage in RMS mode) the current demand rises to achieve the higher voltages over 3.7 volts of the battery.

 

[kiwivap]

There should be no difference because the voltage is regulated right to cut off. However, tests did show the Vamo hits a little bit harder in watts mode with 2x 18350. And you can go up to 15 watts with 2x 18350.
You can see the results here - use Google translate for the text:
Akkuträger VAMO VV/VW Chrom (aka Telescopic VV XSTAR) » Mountain Prophet

That was on a version 1 Vamo, but its the same chip as version 2.

 

[Fiamma]

If you're going to stack be sure to read up on how to care for the batteries. It is a LOT different than just sticking any two batteries in the tube.

 

[Mudflap]

If you're going to stack be sure to read up on how to care for the batteries. It is a LOT different than just sticking any two batteries in the tube.

True dat.