The drone is as good as brand new. It is only flown once a year when traveling outside Dhaka, and otherwise kept on display at home. Because it is flown only once a year, the battery has swollen. Even with this swollen battery, the drone can fly for about 10 minutes. This is a very heavy-duty drone. It can be flown easily in strong winds at Cox's Bazar sea beach, which is not possible with other cheap Chinese drones. It supports 4K video recording. Search on YouTube for more details or please call me.