Popular Post UKRobster Posted November 17, 2021 Popular Post Share Posted November 17, 2021 Had a Lipo puff up last night, just wanted to remind others of the potential volatility of these batteries. Store them in the garage and obviously its started dropping in temps now were in the middle of November. Although living in the South West it's not too cold yet! Forecast for today is dry so, hoping to get out for a quick bash at lunch time. Fetched the lipo's out of the garage yesterday evening and let them sit in the house for about 45 mins to an hour before plugging the first one in. The first one has puffed after a 40 min charge, then plugged the 2nd in straight after and that one is fine. So I reckon they needed to be in the house for a good couple of hours before charging. That's the only difference between the 2 batteries. Both were storage charged about 3 weeks ago and been in garage since then. Have had the same amount of charges and they're only 3 months old. Absima 3S 6200 mAh 60C. Will be dumping into a bucket of salt (sea) water later. For anyone else that stores them in the garage just be warned to do the same thing! Let them come up to room temperature for at least a couple of hours. 4 1 Quote Link to comment Share on other sites More sharing options...
James.S Posted November 17, 2021 Share Posted November 17, 2021 Thanks for this post mate. I store my lipos in the garage as well and last time I brought one in to charge I only let it warm up in the house for about 20 mins. Luckily I didn't get the same reaction as what's happened to yours though, but I will definitely leave it a couple of hours next time 👍 Quote Link to comment Share on other sites More sharing options...
Darren Frosty Posted November 17, 2021 Share Posted November 17, 2021 are we saying if I charge batteries in the garage in the winter they're going to die then? I didn't know that Quote Link to comment Share on other sites More sharing options...
UKRobster Posted November 17, 2021 Author Share Posted November 17, 2021 19 minutes ago, Darren Frosty said: are we saying if I charge batteries in the garage in the winter they're going to die then? I didn't know that Not sure about that I'm afraid. Just wanted to bring this to folks attention based on my experience as the winter months are closing in fast (apart from that it chokes me to have to bin a 3 month old £45 lipo). Test for yourself and go with what works. It could be model & even individual battery specific. Just keep an eye on them if you do charge in the garage. Definitely not set and forget!! Quote Link to comment Share on other sites More sharing options...
Redback Posted November 17, 2021 Share Posted November 17, 2021 I personally dont store my RC's in the shed or garage, it gets to damp and cold out there for electrical goods imo. If the batteries were cold could this cause them to puff as the lipo cyristalizes?, charging warm lipos also gives more capacity from what im told. 1 Quote Link to comment Share on other sites More sharing options...
turok007 Posted November 17, 2021 Share Posted November 17, 2021 when a lipo is cold the voltage drops so what might of happened is as it was charging it got warmer and something went wrong.. I use to fly Rc planes a lot and when in the air lipos act different because of the cold. you can do a simple test. check voltage while it is out in the cold then bring it in for a while then check it again voltage should of jumped. you can put more V into a cold pack but when it warms up it will go over V 1 Quote Link to comment Share on other sites More sharing options...
Bajadre Posted November 18, 2021 Share Posted November 18, 2021 tempertaures changes arent good for lipos the chemistry reacts very quickly indeed ive always stored mine room temp in spare room in a ammo box good advice OP on temp changes 👍 2 Quote Link to comment Share on other sites More sharing options...
Douge one Posted November 18, 2021 Share Posted November 18, 2021 Rapid changes in temperatures are definitely bad for lipo, but storing in cold prolong lifespan of lipo🤔 My guess would be that bringing from cold to warm lead to condensation of moisture inside hardcase. I would try to store them in vacuum bag ( no air means no condensation) 1 Quote Link to comment Share on other sites More sharing options...
Redback Posted November 18, 2021 Share Posted November 18, 2021 (edited) I run lipos underwater condensation is not the issue nore is water, the cold however reduces runtime by a huge amount, unsure why i was told charging lipos that are warm store more mha, the lads at ROSSA were charging their 8000mha 4s battries ontop of their 1.1 cars in the summer, it was over 30c air temp would have been 45c ontop of a black car, i didnt think heat was good for them but i know cold isnt. I found some info here too.https://www.gensace.de/blog/temperature-affect-lipo-battery-performance/ Edit: OP what amps were you charging at and what charger please? Edited November 18, 2021 by Redback Quote Link to comment Share on other sites More sharing options...
UKRobster Posted November 18, 2021 Author Share Posted November 18, 2021 44 minutes ago, Redback said: I run lipos underwater condensation is not the issue nore is water, the cold however reduces runtime by a huge amount, unsure why i was told charging lipos that are warm store more mha, the lads at ROSSA were charging their 8000mha 4s battries ontop of their 1.1 cars in the summer, it was over 30c air temp would have been 45c ontop of a black car, i didnt think heat was good for them but i know cold isnt. I found some info here too.https://www.gensace.de/blog/temperature-affect-lipo-battery-performance/ Edit: OP what amps were you charging at and what charger please? Interesting info there regarding temperature cause & effect. Seems that storing them in a cold garage is OK, but they do need to be brought up to temperature before charging. Maybe as mine is a hard case LIPO this would also affect the time to come up to room temp, needing longer. I use this charger https://www.skyrc.com/Charger/e680 & charged at 6.2A (1C) from a storage charge state. Quote Link to comment Share on other sites More sharing options...
Douge one Posted November 18, 2021 Share Posted November 18, 2021 1 hour ago, Redback said: I run lipos underwater condensation is not the issue nore is water, the cold however reduces runtime by a huge amount, unsure why i was told charging lipos that are warm store more mha, the lads at ROSSA were charging their 8000mha 4s battries ontop of their 1.1 cars in the summer, it was over 30c air temp would have been 45c ontop of a black car, i didnt think heat was good for them but i know cold isnt. I found some info here too.https://www.gensace.de/blog/temperature-affect-lipo-battery-performance/ Edit: OP what amps were you charging at and what charger please? Nothing wrong with storing lipos in cold quite opposite battery losing charge at slower rate ( I got 3s I use once a year and it's stored in cold I lose no charge in a year) they do discharge way faster in low temperature tho. Running in water and condensation would be different I think ( when it's raining and I'm in cold house I'm dry, as soon I start heat up inside there will be condensation on windows in no time. Heat it's definitely deteriorating battery lifespan. Quote Link to comment Share on other sites More sharing options...
turok007 Posted November 18, 2021 Share Posted November 18, 2021 2 hours ago, Redback said: I run lipos underwater condensation is not the issue nore is water, the cold however reduces runtime by a huge amount, unsure why i was told charging lipos that are warm store more mha, the lads at ROSSA were charging their 8000mha 4s battries ontop of their 1.1 cars in the summer, it was over 30c air temp would have been 45c ontop of a black car, i didnt think heat was good for them but i know cold isnt. I found some info here too.https://www.gensace.de/blog/temperature-affect-lipo-battery-performance/ Edit: OP what amps were you charging at and what charger please? What they are doing at ROSSA is not a average day for most people. As speed runners want packs to be warm/hot as they are pushing lipos vary hard right away so they want full power from the go also very short run times. Also might be getting new lipos every few runs as they want the best results Quote Link to comment Share on other sites More sharing options...
dazp1976 Posted December 6, 2021 Share Posted December 6, 2021 On 17/11/2021 at 10:08, UKRobster said: Had a Lipo puff up last night, just wanted to remind others of the potential volatility of these batteries. Store them in the garage and obviously its started dropping in temps now were in the middle of November. Although living in the South West it's not too cold yet! Forecast for today is dry so, hoping to get out for a quick bash at lunch time. Fetched the lipo's out of the garage yesterday evening and let them sit in the house for about 45 mins to an hour before plugging the first one in. The first one has puffed after a 40 min charge, then plugged the 2nd in straight after and that one is fine. So I reckon they needed to be in the house for a good couple of hours before charging. That's the only difference between the 2 batteries. Both were storage charged about 3 weeks ago and been in garage since then. Have had the same amount of charges and they're only 3 months old. Absima 3S 6200 mAh 60C. Will be dumping into a bucket of salt (sea) water later. For anyone else that stores them in the garage just be warned to do the same thing! Let them come up to room temperature for at least a couple of hours. I also had this happen. But.... Nothing to do with the cold. It was ran too hard on the previous use. Yes they do say that cold is not good for them but mainly if temps are in the minus figures. I wouldn't store them outside in winter myself. Mine are lipo bagged inside buscuit tins in a cupboard. 1 Quote Link to comment Share on other sites More sharing options...
Buggy Malone Posted December 8, 2021 Share Posted December 8, 2021 (edited) These Lipos seem like mini bombs to me if not treated correctly. I've just bought myself a small ammo box from the army stores so I'm happy (for the first time since Lipo purchase) to keep them in the house. Edited December 8, 2021 by Buggy Malone Quote Link to comment Share on other sites More sharing options...
Stormbringer Posted December 8, 2021 Share Posted December 8, 2021 Remeber to remove the rubber seal on the ammo box tho If you dont and a lipo does go off the build up of pressure could make it explode 1 1 Quote Link to comment Share on other sites More sharing options...
stretch Posted December 8, 2021 Share Posted December 8, 2021 You'll need to discharge first using a bulb or brushed motor first as iirc if you put them in salt water before discharging it dissolves the battery tabs but doesn't actually discharge it. Quote Link to comment Share on other sites More sharing options...
Buggy Malone Posted December 8, 2021 Share Posted December 8, 2021 1 hour ago, Stormbringer said: Remeber to remove the rubber seal on the ammo box tho If you dont and a lipo does go off the build up of pressure could make it explode Many thanks for the top tip The not-so-funny thing is that I've just adjusted the seal so that it's fully airtight now so I best sort that out asap. 1 Quote Link to comment Share on other sites More sharing options...
Stormbringer Posted December 9, 2021 Share Posted December 9, 2021 Yup Quote Link to comment Share on other sites More sharing options...
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