Hello, do I understand it correctly, that the CoDrone drive kit cannot be used with the camera add on? Thanks!

The battery is definitely dead. I was able to charge it "fully" again - until the charger LEDs went off, then inserting it half-way the drone went on, but then trying to take off the motors made about 180° and stopped.

Thanks for your reply, @robolink_leila No, the battery doesn't look puffy

But it actually seems to me now that there's a bad contact somewhere. As I've written above I was able to charge it - or at least so I thought - in the morning the lights on the charger were off. But then as I plugged the battery into the drone, it sometimes went on, but then if I just moved the battery a bit it went off. And sometimes it was on when the battery was half-way inserted but went off if I pressed the battery all the way through. And even when the drone was on and I tried to fly it, motors wouldn't turn and the LEDs on the drone would blink - but also not always...

Replying to my own query: I must have forgotten in the months past: the battery has to be charged from a PC, using a complete data USB cable, not just a charger or a charging cable with only power wires. I was looking yesterday and couldn't find it anywhere in the documentation, maybe would be good to make it more obvious and easier to find, assuming my finding is correct.

I haven't used my CoDrone for a few months, now I tried to charge the drone battery and I've got the same problem - both charger LEDs stay red. The drone doesn't react when the battery is inserted. Is the battery dead?
Thanks
Guennadi