Do not get complacent when charging batteries. With the hundreds of cycles I have put through lipos, they do seem safe and harmless. But today, I had my first catastrophic failure with a 3s lipo that vented.
Always charge at a safe charge rate (1C is best)
Do not charge on top of a combustible surface (wood table, like I did, is bad)
If you have a fireplace, charge inside of it! It is meant to contain fire and fumes
If you don’t have a fireplace, charge outside. Even better option than fireplace
At least get a lipo safe bag - this saved my house from burning down
Do not leave charging batteries unattended - I made a quick run to the store and put my girlfriend/dogs in a dangerous situation
The brand of the battery does not matter. All brands have failures. Be vigilant. I thank my lucky stars as I know it could have been much worse (not sure why thumbs are stretched, but clicking shows normal pic)
These happen very rarely, but the consequences can be tragic. STAY VIGILANT!