Hi All! So as it was said above the Phantom series uses LiPo (lithium polymer) Batts and not Li-ion. They are quite different. Lipo's have the great power with RC pilots need to power the motors and receivers and electronics in our model aircraft. We do use certain techniques to make our Lipo's last as long as possible. Such as ''exercising'' the pack when we first get them, cycling the pack after so many uses or when we see a diminished MaHours when charged or to rebalance a pack etc.... If you would like to know more about how modelers with tons of battery experience care for there Lipo's you can search things like ''how to cycle lipo batteries''. hangtimes.com has a lot of info on battery technologies used in model aircraft. For instance, A123 batteries are now used a lot in fixed wing and that is what I use in my 30% gas sBach to power the servos and electronics etc.....The stock charger that comes with the dji stuff does not have cycling features. But you can manually cycle them. Make sure you dont discharge your lipo's below the safe limit, which I have written down on my charge bench. All the technologies, lipo, li ion, A123 (LIFE), have different safe discharge levels and you dont want to mix them up, thats why i have it written near my charge bench and dont rely on my memory (A-G-E) LOL. Never discharge lithium batts to 0volts unless you are recycling them.
Using proven methods of battery care will make you batts last the longest they can!
Best of luck!