Hey guys. Been too hot to fly here for a long time plus I've been spending more time changing batteries than flying. My issue is that I ordered 6 zop 2200 lipos from gear best and checked the voltage right out of the box on all packs.3 packs read around 3.7 volts but 3 had one cell lagging at 1.7 or so. I use an I charger and it refused to charge. I went to NiCad mode and got all up to 11.1 and began charging in lipo mode. But one pack swelled and one showed no voltage on one cell. but I checked it again and it showed 1.5 so I'm charging it now. Guess this is more just info on zop batterys since they came from China and I wont be sending them back. Just a little food for thought.