I sound like a broken record, Lipos are VERY safe when some basic rules are followed. On any Yuneec forum I frequent, there was only one report of a battery catching fire and it was a Venom battery, not an OEM battery. I don't even recall if it was a Q500 or TH battery. There was even some discussion/admission the user may have punctured one of the cells.
I've run lipos now for over 8+ years. I started running them when they were available for R/C cars. I raced locally and nationally for many years. In all that time I only personally witnessed one fire. It was not an explosion, its smoldered and eventually caught fire. Problem was a battery that was being improperly charged. People reference Youtube videos as evidence of the dangers and volatility of Lipos, but every video I'd ever seen was some knucklehead doing something stupid like puncturing the case. The time to be careful and monitor lipos is during charging. If something bad is going to happen, its going to be then or shortly after (shortly after, because its being improperly charged).
In the early days of lipos I treated them like Nicads. Bad move. Don't store lipos over extended periods fully charged. I did, but it NEVER resulted in a fire (there was very little information at the time on the care and feeding of lipos). It only resulted in dead cells and badly swollen batteries. I've stored lipos with about 30% charge for over 3 years and they still took a charge and worked. I've also accidentally stored a lipo for 3 years that was fully charged. The pack was so badly swollen the hard plastic case had split so wide I couldn't get it within an inch of closing. 3 years and no fire.
On my Blade QX350, I'd even run batteries that were slightly swollen/puffy, with no ill affect. Didn't time it, but flight time did not appear to be any shorter...
I've never used a lipo safe bag charging my batteries as I'm always near-by monitoring the charge, If I'm storing them short-term like a couple weeks to a month, 30% charge, Long-term 50%, If I'm not "planning" on using my batteries for a month or longer, I put them in a metal ammo can. When I charge them and I'm not using an OEM charger, I use 1c charge rate. I have gone a little higher (which I would not recommend to anyone unless they know what they are doing).
I've not seen a decent lipo safe bag that will fit a battery and still fit in the foam in the cut-outs for batteries. I would "think" storing it in a fire safe bag and in the foam may not prevent a fire even if the foam is not directly exposed to flames. Lipos burn hot, While the bag may stop flames, it won't stop heat which still may be hot enough for the foam to combust (Caveat, as I stated I don't use a bag so I may be way off on the heat). A
BTW, I'm NOT telling anyone what to do or that lipo safe bags are a waste of money. I'm simply relating my experience. Do whatever you need to feel safe. Like someone said in another thread, its "insurance", another precaution. I just think Lipos get a bum rap, that they are time-bombs just waiting to explode into flames...
So I'll be buying the Yuneec Typhoon H Pro with the included backpack. And I've heard and seen Lipo batteries exploding or catching fire trough a rapid discharge and was wondering if the YTH LiPos also do this. I would buy the Lipo safe bags, but I don't know if the batteries will fit into the backpacks foam with the safe bags.
Any experience? Do YTH LiPos catch fire? Are there Safe Bags that fit into the foam?
