crt.5 velenion cutting out

i dont know if its related but when i converted my .5 i struggled with the same problum for weeks and in my case it turned out to be a brand new 3800 2s orian with a bad cell and because im a dumb ass i never checked it and move on to things like a glitch buster ,different motors ,gears ect.I never thought to check the pack because it was new and my lippo charger was willing to start and finish a charge cycle.But when we checked the indiviual cell voltage #2 was way under volt .hooked up another pack known to be good and all the low power/no run time troubles were gone! anyone need a brand new LRPx11,4.5cheap?have fun.