Hi there i just want to ask if anyone could tell me if i dont use the drone to much is it better to leave the batteries fully charged or empty which is the best option to not damage the batteries
Check out this post for more information about maintaining the batteries while in storage.
If you don't touch your batteries, they will automatically discharge down to the storage level. You need to keep an eye on the charge levels after that point though. If you put them away for a long time and don't recharge them and/or use them, they will likely swell up and become permanently damaged.