The batteries on the Helicopter need to be fully charged to take off.
And important: to recharge the helicopter fully it needs really good base unit batteries.
I find all this a waste so - I used a wall power supply to supply suitable power to the charging bases of these helicopters give more consistant results than using batteries.. Just make sure you are using a 9V DC wall transformer (6 1.5v batteries = 9v) and that the polarity is correct.
manual is here http://www.brookstone.com/webassets/pdf/651307p_manual.pdf
Answers & Comments
The batteries on the Helicopter need to be fully charged to take off.
And important: to recharge the helicopter fully it needs really good base unit batteries.
I find all this a waste so - I used a wall power supply to supply suitable power to the charging bases of these helicopters give more consistant results than using batteries.. Just make sure you are using a 9V DC wall transformer (6 1.5v batteries = 9v) and that the polarity is correct.
manual is here
http://www.brookstone.com/webassets/pdf/651307p_manual.pdf