I just bought a new Parrot battery for my Bebop 2. I tried to charge it but the charger blinks red rapidly. I've tried to get help from Parrot but have not been able to get through to them. I never had a charging problem with my original packs but they're not holding a charge any more. I checked the charger and it seems to work fine. I charge the controller without any problems. What might be going on? Thanks