I was reading Gibbs guide to lithium batteries the other day and had to smile at one of the sections, Gibbs Guides for those who have not encountered them are considered to be a bit of a bible to the modelling world. Anyhoo it was talking about transporting batteries to and from the field and it mentioned using a steel container,which is what i use,i thought great!, then it mentioned ammo boxes are ideal, so i thought of Andy's ammunition boxes, then it went on to say only one battery per box,whaaat!, i agree it makes sense on one hand but its hardly practical is it?, i wouldn't have room for models if i did that. I think the bmfa magazine sums it up,there is no room for complacency when charging,it also mentioned li po charging bags which opens another can of worms, what do you think?.
I personally think the only time a lipo will ever fail, is during charging, discharging too much or crash. Stored they are completely safe. I store mine in drilled Ammo boxes, but in one box I have 2 6s 6000mah and 2 8s 5800mah, so if they went up it would be quite a show. However no its just not practical to have an ammo box per battery, thats just silly.
Lipos dont just BLOW, they show a lot of signs the main one obviously swelling. I charge mine in lipo safe bags on the cooker top (where fires happen) and under supervision, I dont leave them to clean the car or nip shopping, if I step out the house they are turned off. Respect them for sure, but listen to them and you will be ok.
If youre not crashing .... Youre probably still in the pits.