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Old 09-03-2011, 07:49 PM   #1
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Ok a new one on me discharge your lipo for storage. Is this what we should do or just one persons opinion over another
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Old 09-03-2011, 09:03 PM   #2
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Re: Batteries

I have heard through a few good sources as well that it's a good idea. I haven't looked into it much but with the amount of money we spend on these power sources I think we should.
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Old 09-03-2011, 09:28 PM   #3
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Re: Batteries

The charger I have has a "storage" feature where by it charges the lipo to 80% of capacity. Apparently one should not store them fully charged for more than a few days as this apparently increases their internal resistance (???).

I read the manual just now :=) The iCharger either charges or discharges the cells to 3.85 V/cell in its "storage" mode. This turns out to be 11.55 Volts, with a fully charged 3S pack being 12.6V.

Last edited by tskca; 09-04-2011 at 09:02 AM. Reason: Correction
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Old 09-03-2011, 09:30 PM   #4
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Re: Batteries

If I am not going to be using my Lipos for a month or so, I put them on a storage charge on my Accucel 6, otherwise they stay fully charged in a dark, cool area in a fireproof container.

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Old 09-03-2011, 10:51 PM   #5
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Re: Batteries

If I don't plan on using mine for a week or so I discharge to 3.8V per cell. I'm not an expert by any stretch, but I do listen to those that are running large, multiple cell high end packs and heed their advice.

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Old 09-04-2011, 05:04 PM   #6
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Re: Batteries

Ideally Li-Pos should be discharged to about 50% for storage for any length of time - Don't ask me how I can vouch for this idea! 'Twas a brand-new pack too!
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Old 09-06-2011, 12:02 PM   #7
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Re: Batteries

It's not a myth. The warmer the battery and the higher the storage voltage, the faster a Lipo will age. This results in decreased pack capacity and increased internal resistance.

Battery University has a in depth article on Li-Ion aging. Some of this can be similarly applied to Li-po chemistries:

BTW, I storage charge all my Lipos after use and I try never to run them below 30% capacity. Storage charging also allows me to quickly charge batteries for those last minute flying sessions. Usually in 7min or less per pack (at 3C charge rates)!
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