It means the battery is defective for whatever reason and needs to be replaced. I also found that you may only get 3 solid blue lights and the 4th flashes and doesn't go solid. Which means it may be bad or it takes 24 hours to charge which is bad. Contact your sellar and state your question if your under warranty they will send a new battery, otherwise it's a wonderful drone.

Please refer to the following methods to solve the pairing problem:

1) Open the drone for two minutes to see if there is normal wifi, then the wifi board and the main board communication line is broken or off

2) Open the remote control three minutes later to see if the phone has wifi, if so, the remote control is normal, if not, the remote control is out of order. If there is a remote control wifi out, look at the lights at the bottom of the aircraft gimbal wifi, whether there is a blue always on, a red flashing, red flashing for normal, off and fast flashing is not normal

3)There is no memory card installed, how big, greater than 128G may not be recognized to cause WiFi version of the card, bad memory card may lead to WiFi version of the short circuit, there are installed to remove to try.

4)If you have an SD card inserted inside your drone, please pull out the SD card first before trying to connect the drone and the remote control. Please try again follow above steps, if it is still can not work well for you, please write back to us or contact our after-sale department directly: bwinedrone@gmail.com. Please do not worry. we are responsible for every product we wold and will strive our best to help you once getting your confirmation, if it is really a defective one, we will arrange a replacement for you.

Charging cable is USB to C charger, please remember of the amps that the battery needs, if you go above it you might ruin the battery.

You can also select no serial number and it will give you one after you pay your $5

Without the camera may affect the drone flight, you are advised that it is better to install all accessories before taking off the drone.

Yes, you can see clearly the drone's altitude, distance, speed, etc. … see more