I bought 2 Venom Fly 2s batteries to use with my MJX Bugs 3 drone. The batteries are 2 cell 2,000 mah/30C. For some reason batteries last only about 3 minutes before Remote Control and drone start flashing "low battery". Once drone lands the battery is showing 7.95V or 74%, which means battery still has plenty of juice to fly on. The stock battery - 1,800mah, 25C 2S is showing 7.57V and 31% upon low battery alarm and landing shortly after. I can get around 10 minutes of pretty aggressive flying from the stock battery. What is the problem here? I charge both batteries to 8.4V using Hi-Tech charger - all cells are properly balanced. Can you recommend any other battery for this drone or should I just use stock? What are your thoughts? Thanks! Gene.