THIS IS A Z8RC SAFETY WARNING
I've lost count of how many LiPo batteries I've purchased. Actually, I lost count a long time ago. I've owned all popular brands and lots of not so popular brands. Even no-brand. I've had weak batteries. I've watched countless batteries give up the ghost. Some even died in batches. A few were DOA.
But I've only had six spontaneous catastrophic failures that I remember, mostly because I remember the airplanes: five broken leads, four of those from metal fatigue at the wire-battery junction in flight (all crashes), one de-soldering under load (crash), and one intense LiPo fire upon plugging the battery into the airplane (heroic save). All five were from a single manufacturer: E-Flite.
My weakest batteries run the brand gamut, but most of my E-Flite batteries quickly find that cesspool.
With my latest catastrophic E-Flite failure, I have no choice but to find E-Flite batteries UNSAFE. These batteries are a fire hazard and the manufacturer is criminally negligent. Do not use E-Flite LiPo batteries under any circumstance.