indianrc

hi
the batteries of my friends are puffed.Why?is it dangerous?like blasting batt.s they havn't been used for a while
plz help!

BarracudaHockey

My Feedback: (11)

Puffed batteries can cause fires.

Use at your own risk.

Those pictures are too blurry to tell much from

Steve Percifield

My Feedback: (14)

It means the chemistry has failed, either by being unbalanced, old, abused, etc..... They are shot, and can be dangerous. discard them

indianrc

they havnt ben used for about 1 year(most of them)but they were not abused
"chemestry has failed" can u explain it for me
THANKYOU so much

indianrc

SO they can cause fire only when used to fly the plane,they wont just start burning on their own.PLZ correct me if I am wrong
Thanks for the help buddy!

TFF

The plates are very close together in these these of batteries. When they are puffed the containment and protection has gone. A bump can set them off. People have lost there cars and houses to these battery fires. If it is charged up it is dangerous. You need a new battery. Also because of the chemistry, water feeds the fire, so you have to have a fire extinguisher to put it out.

BarracudaHockey

My Feedback: (11)

Fire extinguisher isn't going to "put it out" unless it's a Metal-X extinguisher, use a bucket of sand. An ABC extinguisher is handy to have but only for putting out anything else around it.

Steve Percifield

My Feedback: (14)

The chemicals that make up any battery will eventually wear out or fail. Soemtimes by age, overuse, abuse, damage, etc. Lipos are fraigil, and can be damaged easily. They need to be charged with the correct charger at the correct rates. Lithium burns on contact with the water in the air, so breaching the casing can be dangerous. Lipos are normally damaged by incorrect charging. No matter what anyone tells you, lithium xxx batteries need to be balanced charged every time. Out of balance cells may be the number one killer. there is really no way to know what cause a lipo to puff, but when they do gases are being released internally and the battery should be discarded in the appropiate manor.

I have never seen or heard of one flaming while in storage. I have personaly had 4 catch fire on me, one that should have burnt down my garage, i was very lucky. 3 of those were charging errors, one happened when i puntured the foil case. these were all learning curve mistakes several years ago when we were all learning how to handle them.

Lipos have come down in price greatly, my advise is not to take a chance. Replace them when they puff.

steve

indianrc

Thankyou so much!!!!!!
U guys have helped me save my models!