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  • August 04, 2021, 06:02:52 AM

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Author Topic: Storing LiPo to 3.85-3.86 Volts/cells  (Read 193 times)

Offline Matt Piatkowski

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Storing LiPo to 3.85-3.86 Volts/cells
« on: July 21, 2021, 10:14:36 PM »
Hello,
I am forced to use the charger that stores LiPo to 3.85-3.86 Volts/cells.
This number cannot be lowered to 3.81-3.82 v./cells that is generally considered the storage voltage.

Is there any negative effect of storing LiPo having a slightly higher storage voltage?

I am using TP 6S 2800mAh 25C. These batteries will be in constant use until November 2021. Only when the weather is bad, I will have to store them, say, for 3-4 days. Otherwise, I will be flying each day.

Regards,
M

Offline PerttiMe

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Re: Storing LiPo to 3.85-3.86 Volts/cells
« Reply #1 on: July 22, 2021, 01:46:05 AM »
Those numbers are close enough. And your storage periods are so short that EXACT voltage is even less critical.
I built a Blue Pants as a kid. Wish I still had it. Might even learn to fly it.

Offline Ken Culbertson

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Re: Storing LiPo to 3.85-3.86 Volts/cells
« Reply #2 on: July 22, 2021, 06:08:24 AM »
Otherwise, I will be flying each day.
If only..... H^^

Have you considered a second inexpensive charger just for storage?  I had one and took it to the field for those days that you just had to fly one more time.  I also doubt that the small difference in voltage over that short period will damage the battery.  I flew two sets of 4 weekly and I would leave them at the "post flight" voltage till the next weekend.  Only ones I would draw down were the ones I didn't use.  Both sets were still good after almost 2 years.  Probably not the best battery discipline but it worked for me.

Ken

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Online Motorman

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Re: Storing LiPo to 3.85-3.86 Volts/cells
« Reply #3 on: July 22, 2021, 09:02:09 AM »
Three one hundredths of a volt? I think you'll be fine.


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Offline Fred Underwood

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Re: Storing LiPo to 3.85-3.86 Volts/cells
« Reply #4 on: July 22, 2021, 11:36:05 AM »
CellPro PowerLab 6 and 8 use 3.86v for storage cutoff, but that voltage falls a bit the first hour.  PowerLab is generally regarded as one of the top chargers, so probably a reliable number to use.  You can also select a different voltage if desired, on PL's.  Does it stop at 3.86v while charging?  If so, what is the voltage and % charge after an hour? 

http://www.revolectrix.com/support_docs/PowerLab_8_users_guide_v2_r3%20082211.pdf

I have seen various voltage numbers recommended that equate to about 40 - 60% charge for storage.  The % changes quite a bit for a very small voltage change in that voltage range. 

Fred
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