[timo64]

Thank you for your helping replies!

I'm not sure that you do understand my case correct. I have two OTG adapters. noone of them allows to "push" charging power BACK to the tablet. It runs still on battery until the end ...
As I wrote - nearly all of the OTG adapters are made to connect a harddisk to a tablet or smartphone and transfer data without computer.
OTG is made first for data transfers without using a computer. That does NOT mean that every OTG adapter allows to charge the tablet at the same time.
If your adapters will charge your tablet until data transfer you are very lucky ...

If you HAVE a constellation who works with charging - I am very interested to know exactly witch adapter works on your equipment (Manufacturer and PartNumber).

I ordered one more from dell - there the manufacturer wrote that it will allow to charge the device and transfer data at the same time.
http://accessories.euro.dell.com/sna/pro...u=470-abes

Now I have to wait some weeks until delivery. Hope this will work now ...

Do you all guys run mobilesheets on battery powered devices on stage?