Changing batteries at 3.6v, no load, or underload?

[Zalen]

This is probably a dumb question, but when people recommend charging your batteries at 3.6, are they referring to under-load, or just the battery by itself?

I made a post on here the other night, thinking something was wrong with my Nemesis and Magma, a 4.2v battery would only put out 3.6 - 3.7 under load. I thought this was uncommon. But after doing a bit of research, I found out that that kind of drop is pretty standard for a .8 ohm coil. However, I was also told by the place I bought the mech from that I should be charging my batteries at 3.6 under load. Hence why I thought something was wrong with my mech (Still might be, not sure?). But a friend told me that you charge at 3.6 not under load. Which made sense to me, but I'd like to know for sure before I change battery habits.

Thanks!

 

[eratikmind]

I charge my batteries when they reach 3.6 to 3.7 at no load.

 

[Zalen]

I charge my batteries when they reach 3.6 to 3.7 at no load.

Thanks for the response, out of curiosity, what's your setup and under-load volt?

 

[Despraci]

I charge my batteries when they reach 3.6 to 3.7 at no load.

Same here, I usually notice a drop around 3.8 and change it before it hits 3.7 a lot of times.

 

[eratikmind]

Thanks for the response, out of curiosity, what's your setup and under-load volt?

The resistance of the atty being the constant, the voltage under load, as measured with an in-line 510 volt meter will drop, as the battery begins to run down.

Perhaps, i'm not understanding your question correctly.

 

[Zalen]

The resistance of the atty being the constant, the voltage under load, as measured with an in-line 510 volt meter will drop, as the battery begins to run down.

Perhaps, i'm not understanding your question correctly.

Ah sorry about that. Basically I posted a thread last night, because a fresh 4.2 battery reads as 4.17 in my nemesis, and then once I put the RDA on I get a reading of 3.7. Basically I was just trying to re-affirm that that is a normal drop, and nothing is too out of place!

 

[Zalen]

Same here, I usually notice a drop around 3.8 and change it before it hits 3.7 a lot of times.

Thanks for the reply! It looks like I'll be getting more than 20 minutes per battery with this newfound information

 

[eratikmind]

Typically, when referring to the voltage drop of a mech mod, we are interested in how efficient the mod is at transferring the voltage.

Sort of like horse power at the crank vs horse power at the wheels due to parasitic loss.

 

[Ryedan]

Ah sorry about that. Basically I posted a thread last night, because a fresh 4.2 battery reads as 4.17 in my nemesis, and then once I put the RDA on I get a reading of 3.7. Basically I was just trying to re-affirm that that is a normal drop, and nothing is too out of place!

Running a 0.5 ohm atty I get a voltage drop of about 0.4V with Sony VTC3 and VTC4. Higher resistance makes for less voltage drop. V-drop will also increase as the cells age and internal resistance goes up.

I swap out my mech mod batteries around 3.7V no load.

 

[Zalen]

Running a 0.5 ohm atty I get a voltage drop of about 0.4V with Sony VTC3 and VTC4. Higher resistance makes for less voltage drop. V-drop will also increase as the cells age and internal resistance goes up.

I swap out my mech mod batteries around 3.7V no load.

Thanks for the tip. I don't know how much difference there would be in the drop between .4 and .8, but I guess a new battery firing at 3.7 under load isn't bad at all.
So just to clarify, when my inline volt meter is on top with the RDA, if it's firing under 3.0v, I'm safe as long the battery itself, without the RDA, is above 3.6?