I am new to this stuff but have been having a good time flying my H107c in my basement. I have a question about batteries and their chargers. I am using 3.7v 380mAh 25C Li-Poly batteries for my quad. The charger I bought (cheap at $17) is a T453 3.7v RC Battery Charger. After using it to charge 4 to 6 batteries at a time about 10 times, some of the ports stopped working and I am getting inconsistently charged batteries. What are the attributes that I need to pay attention to when choosing batteries? Voltage? mAh? The 25C (what does that connote?). Of course size and dimensions are important. How do I ensure the right size? And once I decide on the set of batteries, what features do I look for in a charger? I want to charge more than one at a time. I'm willing to spend the money but don't want to buy batteries or a charger that will not support the H107c. Thanks in advance.