Hi fellow pilots, I got a couple questions here. Just getting my Yuneec Typhoon G drone going again. Nothing was wrong with it before I shelved due to work and life. I'm new to LIPO powered toys and I just want to get anyone's opinion regarding 5400mAh LiPo 4K 3S 11.1V 3C LiPo batteries. I have a IMAX B6 battery charging device for my battery. Today I got this message after trying to charge/discharge the battery. Also is it worth buying the 7500mah battery for $67? Any tips and proper battery maintenance ideas? THANKS!