how much capacity does your recharging show after running until lvc kicks in?

[1945dave]

If your LIPO batteries are stated as say 4,000ma after running them to lvc cutoff how much capacity does your charger say it replaces to bring the battery up to full charge?

[jamespl]

That would depend what the LVC is set to IE 3.2v or 3.0v

[JimClark]

And also your setup, amp draw motor prop ect

[1945dave]

HaHa, you thought you could trick me with that answer? My question has nothing to do with what setting the lvc is set to. I asked what does your charger indicate when recharging your discharged batteries? I don't care what lvc setting your esc is set to, just how close to the stated capacity of your batteries does your charger say it takes to bring them back to full charge? I am not trying to be smart or funny, but I really want to know, do many guys see from their battery/charger capacity readings close to the stated capacity or not.

Now if you have seen my other post regarding trouble with my Turnigy ESC and the lvc function this kind of goes hand in hand. It is my understanding if everything is working correctly it should require recharging values close to the stated capacity of the cell needing to be recharged. Hence my question above. How close does your setup indicate? If your ESC is set to 3.2 volts great, so if you have a 4,000 ma battery and you ran it until the lvc kicked in how close to 4,000 ma does your charger indicate it took to top off the cells to full charge?

Thats it, please give me an honest answer.

Dave

[1945dave]

Another trick answer? To answer my question none of that matters. I am not trying to cook my batteries or abuse my batteries. I just want to know for your setup what do you see, nothing more.

Dave

[jamespl]

Well on a genesis hull. Turnigy XK-4074 2000kv motor, 180a ESC, x642 prop. On 6000mah 2s batteries with LVC set to 3.0v it puts about 5200mah back in. But if the LVC was set to 3.2v surely it would put less in? I usually find between 5000mah and 6000mah batteries they take around 1000mah less than the stated capacity to bring them back upto full charge.

[1945dave]

Amen and Thank You. Finally a real answer that i can relate to. Would your ESC be a Turnigy 180? That would be of value at this time. I would like to hear from some guys with a Castle ESC and see what they have expereinced as well.

[JimClark]

I don't run them that low as I only race. Only put back in 2200 to 2500mah in my 1/10th scale hydro

[jamespl]

Amen and Thank You. Finally a real answer that i can relate to. Would your ESC be a Turnigy 180? That would be of value at this time. I would like to hear from some guys with a Castle ESC and see what they have expereinced as well.

Seaking 180esc but identical to the turnigy 180a esc

[1945dave]

Okay, here is where I am coming from. I have several helicopters and several of my friends do as well. We almost without exception use Castle ESCs and it is very normal for us to fly until the lvc kicks in and then when we recharge we usually pack right back into the battery the full stated capacity or nearly so as indicated on the packs. More knowledgable people than me take the position that LIPO batteries need to be deep cycled on a regular basis to maintain their useful capacity. They also believe that the reason the batteries have a stated capacity is to tell you how much use you can expect from them. From what I am learning it seems that the Turnigy/Seaking ESCs never allow you to use that capacity. That is a tell tale result that I don't recall ever reading about on this or anyother forum. If it is true that other brand ESCs do a better job of allowing the full capacity of a set of batteries to be used that would be good information to share. It would also be good to know if someone is on a regular basis using most of that capacity how the useful life of their batteries is affected. Again according to some more knowledgable guys on this subject than me they believe that it does a battery no harm in using that capacity and even to not use that capacity lets the battery become trained to a lower level of useful capacity. A term memory effect describes this situation.

Dave

[oscarel]

If lvc is set properly on your castle esc how are you using the complete lipo capacity?

Sent from my SAMSUNG-SGH-I997 using Tapatalk 2

[ozzie-crawl]

Personally i have never seen any signs of memory affect when using lipos.
In my experience how much you discharge cells is Dependant on amp draw. Having a low amp draw will allow the cells to discharge more before the lvc kicks in as there is much less voltage sag,while a larger amp draw will have more voltage drop under load.
I generally run lipos in cars down to when the lvc kicks in as there amp draw is relatively low compared to boats, but boats i time the run
as i usually prop for performance not run time and find cells last longer.
Also i never balance cells unless there out by more than .03 of a volt.

[ozzie-crawl]

If lvc is set properly on your castle esc how are you using the complete lipo capacity?

Sent from my SAMSUNG-SGH-I997 using Tapatalk 2

Not directed at me but
If amp draw is not high you get less voltage drop allowing more capacity to be used, plus if using turnigy etc there capacity is often under stated.

[Brushless55]

Amen and Thank You. Finally a real answer that i can relate to. Would your ESC be a Turnigy 180? That would be of value at this time. I would like to hear from some guys with a Castle ESC and see what they have expereinced as well.

Uh a little strange to me as there are many things working here....

Not directed at me but
If amp draw is not high you get less voltage drop allowing more capacity to be used, plus if using turnigy etc there capacity is often under stated.

yes this is correct!
many things effect LVC vs Mah put back into packs
Bigger better higher C rated packs can run longer to LVC vs lower quality lower C rated packs...
a 20c 5000mah pack will put less back in vs a 60c 5000mah pack
besides a LVC is not the resting volts
just sayin

[1945dave]

Yep, I am now understanding that Turnigy ESCs have lvc issues. That is why I was hoping someone could tell me how things changed when they used a highly regarded external LVC which was very accurate and reliable.

Thanks,

Dave