Batteries go to 3.7V --- APVs go to 6V --- ???

[Screamin Eagle]

Ok I know this has probably been beaten to death, but I've tried looking through some of the posts (at least the first two pages) and couldn't find anything on it.

Now from what I've been reading most APVs use the 18650 battery. This battery is rated at 3.7V. Most mods I've seen can go to 6V but are recomended at around 4V.

Do these mods have a pull up circut for the voltage, or are they just set for a higher battery voltage from say 2-18350s?

I'd like to know this because I have a small VV pass through that I hit a sweet spot on at about 3.7 volts. I'm looking into getting my first mod and need to know weather I should go for one 18650 (plus a spare) or go for two 18350s to have some playing room. If the mods have a voltage pull up circut in them then even if it only hits 5v it would be plenty.

 

[Thrasher]

the regulated mods ( like vamo, provari etc. have a conversion circuit in them that will boost or drop the voltage to what you set off one battery. there is no need for stacking in most of the modern mods.

make sure to use unprotected high drain batteries only as they need the extra current to get that extra voltage. protected cells dont work well in a VV/VW.

you will find with the big batteries you will get more kick from the same settings most of the time.

 

[Baditude]

Battery Basics for Mods: IMR or Protected?

 

[WarHawk-AVG]

Buck Boost converter:

http://en.wikipedia.org/wiki/Buck%E2%80%93boost_converter

http://www.ti.com/lit/an/slva059a/slva059a.pdf <- PDF on the subject

And you thought OHM's LAW was hard to understand

Believe it or not...it's an advancement/enhancement of the driver circuits for the high power CREE LED flashlights.
Ever wonder why a kick looks almost IDENTICAL to one of those?

 

[RaceGun59]

If you put DC batteries in series you get the sum of their voltage. Two stacked batteries will read 7.4 VDC. That is NOT going to make a printed circuit board that is designed for a input voltage of 3.7 VDC very happy.

 

[WarHawk-AVG]

If you put DC batteries in series you get the sum of their voltage. Two stacked batteries will read 7.4 VDC. That is NOT going to make a printed circuit board that is designed for a input voltage of 3.7 VDC very happy.

Most APV's can handle higher input voltages into the control circuitry...I know the Vamo V3 has no problem with 2 18350's stacked...but I like running 2+ days with a 18650 in it

 

[RaceGun59]

Ah.... Most of them have been "murphy" proofed.

 

[Screamin Eagle]

Battery Basics for Mods: IMR or Protected?

I read through this. It's what got me thinking about the pull up (or boost) circuts. I think if I'm going to do this I will go with the IMR batteries. If what Thrasher said is true about the protected ones I'm going to need to get the IMRs just to be safe.

Buck Boost converter:

http://en.wikipedia.org/wiki/Buck%E2%80%93boost_converter

http://www.ti.com/lit/an/slva059a/slva059a.pdf <- PDF on the subject

And you thought OHM's LAW was hard to understand

Believe it or not...it's an advancement/enhancement of the driver circuits for the high power CREE LED flashlights.
Ever wonder why a kick looks almost IDENTICAL to one of those?

WOW! Maybe I should have payed more attention in algebra!!

I understand the circuts concept. It's actually easier to boost voltage (circuitry wise) then it is to cut it down. I just didn't know if the mods these days had such circuitry. I guess I just underestimated their capability.

Thanks for everyones help.