Unfortunately the charger unit on mine didn't work properly.(After 10 minutes it thinks it is charged when it's not. Shows 3 solid leds). When switched on after a few hours being off it flashes 7 times and says the battery is dead. The battery works fine in the NAO1 charger pack and NAO1 charger pack works on NAO2 so I can get a good working one for now. So the regulator is faulty it seems. In case anyone else has this problem.
I called Decathlon and got them to send another one for in store collection so I could swap the faulty light. This won't arrive for a couple of weeks as they have all sold out(obvious) and I didn't want a refund(again obvious).
Looks like you can still order one and I was assured they were coming in at that price still.