Hoping someone can shed some light on a problem i have with Chroma batteries. After flying for 20 minutes in the cold then returning indoors, all my batteries after being fully charged for over 4 hours each, all of them when attached give a warning on my controller that they are under 10.2 volt and i am unable to gain lift due to the low voltage. I tried letting them run down to full discharge then recharge but have same problem.