[lutach]

I don't really use any. All the fire videos seen in youtube was made by idiots. I still have to see any of my good lipos puff. The only one that really puffed on me for no reason at all was a Max Amps 3S pack. If abused any sort of energy storage device will fail in its own fabulous way. I've blown and burned many caps, NiXX and old lithium cells just to see what would happen and to be honest all of them go bad if abused. Just use proper charging methods and watch them just like you would watch your old NiXX packs.

Edit: BTW, I'm still using my old Astro Flight 109 with the old software and the new chargers from what I heard are much better and can even charge at 2C safely.