swampyankee

I understand these batteries can combust while charging, the question is can they combust after they've got a full charge. More to the point, can I charge them the night before I fly the a/c and allow them to set overnight in the plane, would that be safe? Or is it best to be mindful of them as long as a charge remains in them? TIA

Gray Beard

My Feedback: (-1)

I tried to copy and paste a video for you but it didn't take??

jester_s1

As long as nothing touches the connector and shorts them out and as long as they aren't damaged at all, they are safe. It's actually quite rare now for them to catch fire while charging since people understand the importance of using a proper lipo charger and the batteries themselves have improved dramatically over the years.

swampyankee

And they'll be OK sitting in the plane with a charge?

I like your sig., very clever.

jester_s1

Don't charge them in the plane, but if you want to charge one and then install it that's not any more likely to cause a fire than charging it and storing it in your field box.

swampyankee

Good deal thanks.

jetmech05

Swamp: I've been flying LiIon batteries for about 5 years now. I even build my own packs. If you use a charger that is capable of charging Li polimer batteries at 1 C you should be fine. But I don't think I'd charge the larger batteries in the airplane.
It is true that Li polimer batts can burn and burn very hard if they rupture.
Yes you can charge the night before and return the batts to the airframe and be ok. Now these batteries are not like NiCads or Nickle metal they don't have to be charged every night before a flight day. On my LiIons I can charge the night before and be good for the next 3 flight days or 3 weeks. I don't recharge unless I'm at 7.5 or so with a 1 amp load.
thats the advantage of lixxx batts the disadvantage is 3 hours to charge.

jetmech05

Swamp I bet I need to further expand my answer. My LiIons are on a gasser 2 5200mAh for system and 1 2600mAh for ignition

swampyankee

The ones I have are part of Horizon Hobbie's Super Cub a friend of mine gave me. 3 channels and an electric motor.

AirMonty

I typically will charge up the batteries the night before, and have had no issues doing so. I would suggest that you never run your batteries below 20% charge, and if they 'puff up', dispose of them properly and don't use them any more.