I just bought a dji neo flymore, charged all three batteries, inserted one into the  neo and tried to power it on. Holding the button down for a few seconds, all the power LEDs light up on the drone but then immediately go off when I take my finger off the power button. I have tried this with all 3 batteries and the same thing is happening. Am I doing something wrong?
Thanks in advance for any advice

Do you push power button, release it for a second ( maybe half of second) then press and hold power button longer till all diodes light up? I'm asking because from your description it sounds that you're only pressing and holding power button.

The instructions are not correct. Like the person above said you must press once quickly and then press and hold the second time.

Hi there,
thank you for reaching out.

To confirm, please press the power button for one second then press and hold the power button for two second to power on DJI Neo.

Feel free to contact us if you have any other questions.

AH, That was the issue! That will teach me not to read the instructions! Thanks all for your help , much appreciated