What experiences do you guys have with Hyperion li-po packs? I've been very happy with the performance of my Hyperion li-po's, but recently my 11.1 35C 1800mAh VX series li-po has developed a strange issue. It takes my computer charger two hours just to balance the cells! I'm 100% sure it's not the charger's fault, because it balances my other li-po's normally. It holds the charge normally and I haven't noticed any decrease in performance, but it takes forever to balance the cells for some reason. Are Hyperion li-po's considered high-end or are they more mediocre?