Lipo winter storage question?? - Page 2 - RCCanada - Canada Radio Controlled Hobby Forum
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Old 11-24-2010, 12:35 AM   #11
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Re: Lipo winter storage question??

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Originally Posted by can773 View Post

No lipo likes to be stored fully charged

See the attached chart, you are 20% loss of life by storing full charge at room temp vs. storing at 1/2 charge
I can completely confirm that. I did a test over last winter with three cheap identical packs from HC. Two of them I left at 100 percent and the third I brought down to 50 percent charge.

By the end of the winter both of the 100 percent packs had not only lost voltage but had puffed up somewhat. The 50 percent pack was completely fine. I charged it and went out no problem. But the 100 percent packs I tossed as they just wouldn't charge as well. It might not be the most absolute scientific test but it convinced me.
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Old 11-24-2010, 06:42 AM   #12
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Re: Lipo winter storage question??

My first Li-Po pack died before I had ever used it as I set it aside after charging it and left it for several weeks - a $30 lesson. Now discharge them down to +- 50% and so far so good.
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Old 11-24-2010, 07:27 AM   #13
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Re: Lipo winter storage question??

It's funny because I think winter is the best time to fly EDFs! You can get large frozen fields or frozen lake and get smmmmmmooooooooth runways that are always available no matter where the wind is coming from. There's nothing worst for me that going to the field in the summer and finding the little wind is just strong enough that I cannot use the runway because it's coming sideway. (Most of my EDFs don't have rudders). So for me, winter simply means more flying places available. Near my place, they even remove the snow a make a huge skate ring on a lake. If I go there early in the morning, there's nobody and I have a 2000ft by 1000ft runway available that the city employees just shined for me. Crashing is very costly though, but I guess it's ofset by the fact that all the parts are easy to find! On the other side, you get a LVC anywhere, and when you look down, yes, there's a runway for you. Here, and here, and here, and there.
OK, I finally learned how to fly a RC plane... Next: Learning to land them, because this is getting costly...
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Old 11-24-2010, 11:41 AM   #14
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Re: Lipo winter storage question??

I still do a lot of flying in the winter, except for last winter. I also don't fly any of my 3S powered planes in the winter. so I generally don't have to worry about storage issues on packs, except for my 3S. when I have stored my 4S+ packs, I always use the storage feature on the charger. I would not argue the point made about storing packs at 100% charge, because they just don't like it. however, there are always exceptions to the rule. as I said before, I always store my packs in the fridge, even though my wife doesn't care for that too much. LOL. I have had a few 3S packs for several years, that I got with my Sapac Euro and I've got several Turnigy packs that are as old. they are always stored at 100% charge and all they've lost over several years, is about 10 seconds flight time on my PZ Spitfire. the Sapac packs are slightly puffy, but are adequate for the job I ask of them. this small loss, is generally accepted over the life of a battery pack, but I haven't experienced any abnormal loss. I wouldn't recommend storing at 100% charge, but in this case, it works for me, so I do what works. as for my 4S,5S and 6S packs, I wouldn't dream of storing them at anything other than what my storage feature peaks them at. you are asking for trouble if you don't store them properly.
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Old 11-24-2010, 03:07 PM   #15
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Re: Lipo winter storage question??

I had a 3S 2200 that I stored at 100% for one winter by mistake. It was ruined...the discharge rate was so low that the fully charged pack would trip the LVC when at full throttle.
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