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Old Nov 01, 2007, 07:33 AM
Four-Eyes is offline
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Lipo left at full charge - how long is OK?


a day? a week? a month?
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Old Nov 01, 2007, 07:44 AM
Challenger 413 is offline
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For me, it is 5 days. If not used, I will discharge back down to 3.7/3.8 volts per cell and put in regular storage. If I am not going to use it for over a month, it goes into a freezer bag, then into the fridge crisper.

Others keep their packs fully charged for longer.

Challenger413
Old Nov 01, 2007, 07:50 AM
everydayflyer is offline
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I have some which have been kept fully charged for over 3 years.

They are not much good for anything however.

Best to store at approx. 3.85 volts per cell at approx. 32F


If you fly only on the weekends and keep your LiPolys charged all the time then 5/7=71.4% of the time they are not being used. If you keep them charged and fly once every 3 day then they are not being used 66.6% of the time.


Charles
Old Nov 01, 2007, 11:46 AM
BarrelRoll is offline
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Is that true for smaller LiPos, like mobile phone and PDA batteries?

IIRC mobile phone manuals say it is recommended to keep the batteries fully charged while the are not in use, but I may be wrong as I usually do not read the phones' manuals properly
Old Nov 01, 2007, 11:49 AM
epoweredrc is offline
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27 yrs. of Aircraft flying.
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I keep mine charged and I may fly them every day or every 3 days or just once a week. what is worse is people who fly them, and the ones who fly them way down and do not charge untill there ready to fly, thats the worse you can do to them
Old Nov 01, 2007, 12:45 PM
xwingnut is offline
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I've heard so many different suggestions in regards to this exact question and I just decided to leave them after a flight and not charge till I'm ready to use that LiPo again then it gets stored that way. Sometimes it's a day or a month before I charge it again but I never run the packs down to the cutoff. I keep a real close eye on each pack when chargin' so I know the capacity of each pack and I use a timer on each flight so I get a really good idea of where the voltage is at any given time during the flight thus I never hit the cutoff voltage.
I figure they have a finite shelf life anyway so they are only goin' to last so long no matter how I store them.
One rule I do follow is that I never charge a new pack till I'm ready to use it because I've had new packs sit for months before the project was ready.

Xwingnut


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