The battery of the drone is one of the most important things. Without the battery, you cannot even power the drone. So taking care of the battery is a must. Since we use a LiPo battery for our drone, there are some things you should know in order to save the battery life. Always use the fully charged battery in your drone while flying. If you wish to keep the battery idle for a long time, charge it to 40 to 65 % and store it in a dry location at a proper temperature, as specified in the battery manual.
Do not allow the battery to have contact with any kind of liquid, as it may short circuit and then reduce the battery life. Always look at the battery monitor while flying the drone. If you see your battery is draining too fast, then land your drone immediately and inspect all the connections and allow the battery to cool down. You can also add the FS_BATT_VOLTAGE...