Robert Cracknell Posted December 5, 2020 Share Posted December 5, 2020 Hi I have a new 3S 2200mAh 35c LiPo which was destined for a project. Due to unforseen health problems the project is now on hold. Using a capacity controller the LiPo cell readout is as follow... Total Voltage 11.42. 36% capacity Cell 1 - 3.806 Cell 2 - 3.805 Cell 3 - 3.809 The charger I have is an Overlander RC-D100v2 Can anyone offer some advice on long(ish) term storage. The battery currently resides in its supplied charged state in a LiPo safety charging bag. How often should I check it?...charge it? Does it need cycling? I am a newbie to LiPo technology and any and all help appreciated. Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted December 5, 2020 Share Posted December 5, 2020 Robert The common 'storage' level is 3,5 V per cell. Your charger has a facility to do this. LiPo self discharge very slowly but it would be advisable to connect the LiPo for a storage charge check every 3 months. If on connection the charger decides it doesn't need a top up it will tell you. If the LiPo does need some charge it will simply restore the LiPo to the correct storage level on each cell. How long do you want to store it? A LiPo may loose a bit of capacity after a year or two at storage level. A LiPo does not need cycling. Edited By Simon Chaddock on 05/12/2020 19:56:59 Quote Link to comment Share on other sites More sharing options...
Robert Cracknell Posted December 5, 2020 Author Share Posted December 5, 2020 Simon Thank you for your reply. Atmo I think it will be at least 6 months before I will need it. Rob Quote Link to comment Share on other sites More sharing options...
Trevor Posted December 5, 2020 Share Posted December 5, 2020 3.8v per cell is a perfectly acceptable storage state. Just check it again every month or so but I doubt you’ll see much self discharge over 6 months. Trevor Quote Link to comment Share on other sites More sharing options...
Martin Harris - Moderator Posted December 5, 2020 Share Posted December 5, 2020 That figure seems a lot lower than the normally advised 3.8 volts. Edit: Trevor beat me to it! Edited By Martin Harris on 05/12/2020 20:27:23 Quote Link to comment Share on other sites More sharing options...
Robert Cracknell Posted December 5, 2020 Author Share Posted December 5, 2020 Guys Thanks for all the feedback. Prior to putting it into store I connected it to the RC-D100, set it to 'STORAGE' and pressed start. Immediately indicated COMPLETE so I guess it is OK to put away. Thanks again. Quote Link to comment Share on other sites More sharing options...
perttime Posted December 6, 2020 Share Posted December 6, 2020 Your pack is almost exactly 3.8V per cell. That is just right for storage. Quote Link to comment Share on other sites More sharing options...
Robert Cracknell Posted December 7, 2020 Author Share Posted December 7, 2020 Thanks again guys... Any special environmental concerns regarding storage? Would a dry cool shelf in a garage/workshop suffice? Quote Link to comment Share on other sites More sharing options...
i12fly Posted December 7, 2020 Share Posted December 7, 2020 Opinions vary but I store mine in lipo safety bags inside metal cash boxes. In winter when frosts start I place the cash boxes on homemade 'warmers'. The warmers are metal biscuit tins (suitably earthed) with an 11W low energy bulb inside. A couple of small holes in the side of the tin allows light to escape so I know the bulbs are still working. If temp outside is -6 degrees C inside the cash box is about 14 C, if outside gets up to +10 C then inside the cash box gets up to low twenties degrees. This has worked well over 3 winters without 'losing' any batteries. Quote Link to comment Share on other sites More sharing options...
Allan Bennett Posted December 8, 2020 Share Posted December 8, 2020 I've got LiPos which are still flying my helis okay at 10 years old. They are stored in a well-ventilated unheated garage within a storage box made up of 1/2" plasterboard, usually at about 25% charge -- that's the charge they finished up at after the previous flight. If I'm not going to use them for a while I charge them up to something around 3.8v, as suggested by others, to avoid any risk of them self-discharging below a safe value. Quote Link to comment Share on other sites More sharing options...
ken anderson. Posted September 2, 2021 Share Posted September 2, 2021 check out a new way to dispose of lipos... ken anderson.....ne...1..lipo dept. 1 Quote Link to comment Share on other sites More sharing options...
MattyB Posted September 2, 2021 Share Posted September 2, 2021 On 05/12/2020 at 18:44, Robert Cracknell said: Hi I have a new 3S 2200mAh 35c LiPo which was destined for a project. Due to unforseen health problems the project is now on hold. Using a capacity controller the LiPo cell readout is as follow... Total Voltage 11.42. 36% capacity Cell 1 - 3.806 Cell 2 - 3.805 Cell 3 - 3.809 The charger I have is an Overlander RC-D100v2 Can anyone offer some advice on long(ish) term storage. The battery currently resides in its supplied charged state in a LiPo safety charging bag. How often should I check it?...charge it? Does it need cycling? I am a newbie to LiPo technology and any and all help appreciated. There is some good advice in this thread, but my reference for all things lipo tends to be Battery University - I would recommend you read this article, it has lots of great info on the topic of storage and extending the lifespan of your lipos. Quote Link to comment Share on other sites More sharing options...
Alan H Posted September 2, 2021 Share Posted September 2, 2021 15 minutes ago, MattyB said: There is some good advice in this thread, but my reference for all things lipo tends to be Battery University - I would recommend you read this article, it has lots of great info on the topic of storage and extending the lifespan of your lipos. Thanks for the link, there's a lot of interesting information there. 1 Quote Link to comment Share on other sites More sharing options...
malcolm woodcock 1 Posted May 29, 2022 Share Posted May 29, 2022 My local model shop (Modelshopleeds) have advised me not to leave Li-pos charged overnight, what is the forums thought on this. Quote Link to comment Share on other sites More sharing options...
Zflyer Posted May 29, 2022 Share Posted May 29, 2022 I think it should be don't charge them over night. Storage 3.8v. I keep mine in the small ammo boxes which I tend to line with plasterboard. Rather than drill holes in them I tend to leave the Box lid closed but unfastened. I must confess I have never used any kind of warming they just live in my garage. However the boxes do not sit on the concrete floor but on cork tiles. Quote Link to comment Share on other sites More sharing options...
leccyflyer Posted May 29, 2022 Share Posted May 29, 2022 3 hours ago, malcolm woodcock 1 said: My local model shop (Modelshopleeds) have advised me not to leave Li-pos charged overnight, what is the forums thought on this. I think it's an excellent shop, but that isn't good advice at all. Did they mean don't leave them charging overnight? That would be good advice. Quote Link to comment Share on other sites More sharing options...
Paul De Tourtoulon Posted May 29, 2022 Share Posted May 29, 2022 mine are 'thrown' all around in my rubbish pile mostly charged, however the experts in our club that use 4/5 and 6 elements let them cool down 24 hours before recharging and store them 'end up' wires top side, Quote Link to comment Share on other sites More sharing options...
MattyB Posted May 29, 2022 Share Posted May 29, 2022 (edited) 5 hours ago, malcolm woodcock 1 said: My local model shop (Modelshopleeds) have advised me not to leave Li-pos charged overnight, what is the forums thought on this. Short answer - read the Battery University link above, it has everything you need to know about storage of lipos (there is lots more scientifically validated battery info on that site too). https://batteryuniversity.com/article/bu-808-how-to-prolong-lithium-based-batteries Edited May 29, 2022 by MattyB Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.