A must for YN-900

Too bad the AC adapter is not standard ...
Especially in the studio or even longer shots you have to not be afraid if the batteries still rich - ok. until now they have always served - but every now and then go to the lamp and check the battery level quite nervous, but that bothers the set, you should keep your head clear because of the "actors", sound, action, light. And as Murphy disciple I know that the batteries would exactly in the "perfect" scene where all voices make flabby ... ;-)
So far, the power supply keeps well, is not too hot.
I hope that in future the very good LED lamp YN 900 is offered as a package equal to the power supply.