Charging warm/hot batteries

[Oyibo VFX]

As I am studying for another drone license, one part is about LiPo batteries. And in my book, they recommend never to charge a warm/hot battery.
Because I have the charging hub from DJI, I always put the replaced battery directly after the flight on the hub.
Am I doing something wrong here? Personally I don't think. Standard for LiPo is 45C.

Any thoughts?

 

[msinger]

The batteries have built-in protection. If they are too warm, they will not charge.

 

[Plawa]

I usually put them on the charging hub when I come back from flying and just walk away.. the last used battery will usually refuse to charge at first but eventually it cools off and charges with all the others. I figured if they built in the protection I may as well just use it to my advantage, i.e. not having to worry about charging it at the wrong time.

 

[Oyibo VFX]

I'm not worried, at least I know now what the flashing leds mean

 

[Thastinger]

Yeah, they flash 1 green light until they cool down enough to begin charging

 

[Oyibo VFX]

 

[Kilrah]

Am I doing something wrong here?

For safety no, they will refuse to charge if they're too warm anyway. For longevity yes, to minimize wear you want to at least let them cool down to ambient, if not wait an extra hour or so afterwards.

 

[TTFullTimer]

Intelligent or not, Lithium batteries are nothing to trifle with. Why not just let it cool and then plug it in. Plugging in Lithium and walking away is not recommended. Ask the sailors at Pearl Harbor that left a lithium battery on the charger when they left on Friday. Saturday there was a nice little $200 million dollar fire.