Understanding the LiPo Lingo
When talking about a LiPo battery, the primary characteristics to understand are the battery’s voltage, capacity, and discharge rate.
For aircraft models, the common practice is to select a battery with a discharge rate that is at least equal to the maximum current draw of the aircraft.
To manage charging risk, I have a smoke detector just above my charging area.
To prevent over-discharge you should not let the battery voltage drop below about 3.5 volts per cell.
End of Life Planning and Proper Disposal
thunderpower is probably still the best in terms of living up to the C ratings. They are the go-to battery for big 12s helis, but very expensive.
A single 6s 5000mah battery is over $200.
Anything else (hyperion, zippy, any hobbyking battery etc) is going to be "reliable" if it arrives at your house at 3.8v per cell and you don't mistreat it.
FPVers tend to want to optimise for flight duration not top speed, so you pick the lightest name brand battery that is currently in stock. A 20c battery is usually more than enough.
I switched over to Gens Ace from Thunder Power. So far Im happy with them. They are cheap compared to TP's and I can get them warrantied here in the states if I get a bad one. 4s 3300 25c for $31.
Dualsky GTS 45C packs from 2Dogrc/ other vendors. They are unreal. Blow the pants off every tp battery I've ever used, and I abuse them too. Put 2800mah into my 2650mah packs yesterday, and they have WAY les voltage sag than any other pack I've seen. I gained almost 50w on my Zeph just by switching to these from Turnigy nanotechs.
The " Name Brand " LIPOS are a ripoff. They are good quality, but I will not pay FOUR TIMES as much for a name brand when I can get a Zippy that works just as well and lasts about the same amount of time. There are bad ones out there to avoid, but Zippy from Hobby King has a good reputation and reviews from users, and a very good price. All LIPO's are life and time limited, and you do not get your moneys worth buying the super over priced ones.