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Warm battery
493 10 2019-12-20
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Manu P4P Paris
Second Officer
Flight distance : 132031 ft

Italy
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I keep 2 batteries inside their places in the hard back pack (material like polystyrene) and I noticed that sometime one of them is a bit warmer than the other one..I charged them about 60% and left in the back pack for storage..auto discharge set to 2 days.. is it normal that the battery is warm?
2019-12-20
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Mark The Droner
Captain
Flight distance : 2917 ft
United States
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I've never noticed any of my batteries, after sitting by themselves with a charge of close to 60%, to be warmer than the air around it.  Good luck
2019-12-20
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Manu P4P Paris
Second Officer
Flight distance : 132031 ft

Italy
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Maybe the discharge system generates heat, plus the material that cover the ventilation holes keeping the temperature makes the rest
2019-12-20
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Mark The Droner
Captain
Flight distance : 2917 ft
United States
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Manu P4P Paris Posted at 12-20 17:09
Maybe the discharge system generates heat, plus the material that cover the ventilation holes keeping the temperature makes the rest

My understanding is there is no auto discharge on a half-charged battery.  
2019-12-21
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Manu P4P Paris
Second Officer
Flight distance : 132031 ft

Italy
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I started to noticed this behavior after I fully charged the batteries for a flight but I didn’t so they auto discharged days after..
2019-12-21
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Mark The Droner
Captain
Flight distance : 2917 ft
United States
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Manu P4P Paris Posted at 12-21 08:30
I started to noticed this behavior after I fully charged the batteries for a flight but I didn’t so they auto discharged days after..

Ahh so that might be the explanation then since a slow auto-discharge may cause a rise in battery temp.  
2019-12-21
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Geebax
Captain
Australia
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Mark The Droner Posted at 12-21 11:19
Ahh so that might be the explanation then since a slow auto-discharge may cause a rise in battery temp.

Any form of auto-discharge must produce some heat, as the battery is simply being discharged into a load inside the battery case. If it is then contained in an insulated pocket in a travel case, then there should be a small but noticeable rise in temperature.
2019-12-21
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Manu P4P Paris
Second Officer
Flight distance : 132031 ft

Italy
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Exactly..but am I the only one that noticed it!?
2019-12-22
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Mark The Droner
Captain
Flight distance : 2917 ft
United States
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There's no doubt heat will be generated with the auto discharge.  I've just never noticed it in that I've never felt it on my fingers or hand.  But I don't store them in a case either - they're out on a shelf in the air.  From your OP, it appears from your description that you had charged them UP to 60% for storage.  So there would be no auto-discharge.  Maybe you wrote it wrong or I am reading it wrong.  
2019-12-22
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Mark The Droner
Captain
Flight distance : 2917 ft
United States
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There's no doubt heat will be generated with the auto discharge.  I've just never noticed it in that I've never felt it on my fingers or hand.  But I don't store them in a case either - they're out on a shelf in the air.  From your OP, it appears from your description that you had charged them UP to 60% for storage.  So there would be no auto-discharge.  Did you mean to say you DISCHARGED them to 60%?  Maybe you wrote it wrong or I am reading it wrong.  

I keep 2 batteries inside their places in the hard back pack (material like polystyrene) and I noticed that sometime one of them is a bit warmer than the other one..I charged them about 60% and left in the back pack for storage..auto discharge set to 2 days.. is it normal that the battery is warm?
2019-12-22
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Manu P4P Paris
Second Officer
Flight distance : 132031 ft

Italy
Offline

at the moment, one battery has 3 led and a bit warmer than the other one that has 2 led and on blinking and it is cold
2019-12-22
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