I can actually Agree with the Turnigy batteries. I have 4 of the Ultimate Nano Tech shorties and literally abuse them and they haven't puffed or lost any power. I have a Team Trinity White carbon stick that I hope lasts due to it's awesome power output . I bought one of the Graphene packs and it puffed after a couple of charges. My latest is the Reedy Zappers 7.6v packs. I don't have a charger that will charge them to that voltage but they seem to be doing fine after many charges. Maybe it's because I don't peak them out on the voltage. The Orange Revtech batteries all have puffed after a few charges and will no longer Balance. This is my experience so far.

I'm actually thinking the charger might have a lot to do with the battery life. Currently I have a Hitec X4. ( the first one out) not the plus