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-   -   Ways to discharge lipos (https://www.rctech.net/forum/radio-electronics/664591-ways-discharge-lipos.html)

RickSlick 09-24-2012 08:52 AM

Ways to discharge lipos
 
Sometimes I do not use my fully charged lipos when I return home from the track. I have a good quality charger but it has no discharge feature.

What is a good safe and slow way to discharge my lipos with overheating or damage? What type of devise can I hook up to the battery which will discharge it?

Thanks, Rick

greywolf74 09-24-2012 09:47 AM

You can use a bulb discharger plugged into the main plug, along with a low voltage alarm plugged into to the balance adapter is a good way

http://www.onlybatterypacks.com/items.asp?db=13

pdxrc2838 09-24-2012 11:29 AM

Why would you wanna discharge lipos? it is better to leave them charged up.

apriliamille 09-24-2012 11:33 AM

im sending you a pm
i do not know if its right and fair to post up an outside forum link

EricW 09-24-2012 12:10 PM


Originally Posted by pdxrc2838 (Post 11247986)
Why would you wanna discharge lipos? it is better to leave them charged up.

I've always read that storing a lipo fully charged is a bad idea.

hotrodchevy14 09-24-2012 12:27 PM


Originally Posted by EricW (Post 11248135)
I've always read that storing a lipo fully charged is a bad idea.

+1...if your not going to be racing for a while use your chargers storage mode, if it has one.

apriliamille 09-24-2012 02:01 PM

i try to keep mine at the 3.8 range when im not using them

GLwagon 09-24-2012 02:53 PM


Originally Posted by pdxrc2838 (Post 11247986)
Why would you wanna discharge lipos? it is better to leave them charged up.

Storage voltage is 3.78-3.82v per cell
SMC had a batch of cells that would puff when stored improperly.

Running them in the car works well.
I use my chargers that do have a storage/discharge feature, what charger are you using?

RickSlick 09-24-2012 08:45 PM

DuraTrax 235

RickSlick 09-26-2012 06:32 AM

I was standing in my local auto parts store and looking for light bulbs for a discharge devise when the light bulb in my head went off.
I went home and built a board that has mounted on it, an old motor, ESC, receiver so that I can simulated a running car. I plug the battery in, turn on the juice and tape the throttle of my transmitter to about 1/4 speed and let her run.

Comments on doing this

GLwagon 09-27-2012 05:13 PM

If you have old esc's & motors, do the ESC's have lipo cut?

In the airplane world motors & esc's are inexpensive.
My one plane with a 8x4 prop will pull near 27amps full load.
Motor $10, ESC $15

Even 1/2 throtle would be plenty, but without a load there won't be much amp draw.

Most ESC's will usually cut near 3.2 to 3.0v per cell, unless it is adjustable.


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