Hi, I just recently got a 720G and bought an additional battery for it. I have read and been advised by Holy Stone that you should not charge the battery 100% and store them. I have read that 50% is about what you should keep them at until you are ready to fly again and then recharge to 100%. Does anyone know of a way to discharge the battery accurately other than flying it and looking at 2 green lights? I looked for a balancing charger with a discharging function but have not been successful in finding a way to connect it to the 720G battery. Also, I have not found anything that says Holy Stone LiPo batteries self discharge like DJI batteries. Any thoughts or ideas would be greatly appreciated.