<span class="Apple-style-span">I checked the voltage on the battery. It reads 3.7 after leaving it on the charger all day. The battery pack is a 7.4V Li-ion. Looks like I will have to get a new one. The charger is very basic and I don't see anyway to change the settings. Since I'm probably going to have to get a new battery, should I upgrade to a higher voltage or will it cause a problem with the other compontents? Can I get</span><span class="Apple-style-span">longer flight times with a better battery pack? Or should I stick with what it came with?</span>