Hello. This is my first time posting here, so please forgive me if this is in the wrong place, but I have a question about my battery that I hope someone could help me with. I recently bought the Hubsan H107D. Being my first quad copter, and second rc ever, I'm not too familiar with some things. Basically, my issue is that the 3.7v 380 mAh battery is suddenly taking a long time to charge. When I first got it, it would take around an hour to fully charge to 4.0v, but now it will go for 2+ hours easily without fully charging. I always stop flying and start to charge when the battery gets to 3.3v and I always charge it to 4v (the light on the charger goes out when it is at 4v) but now it seems that no matter how long it charges, it won't get to 4v, the light won't go out on the charger, and it dies a lot quicker than it used to (1 minute of flight time rather than 7-10) . I've only had it for around 4 days, and I'm just worried my battery will become a hazard. Any help would be greatly appreciated, and again, sorry if this is in the wrong place. Thank you!