I think you need to use a USB 2.0 OTG adapter cable (Micro USB to USB socket, depending on the phone/tablet you own) that "pushes" charge from your phone to the board but I'm not 100% sure that's going to work. And you have to make sure the USB port on the phone/tablet supports the OTG function. Ciao
DGT Smart Board and Android

To the best of my knowledge, you cannot use the DGT Smartboard with the chess.com Android app. You can only use blue tooth boards which have led lights to indicate the moves. I use my pegasus on chess.com android. But in my experience, I have not been able to use the Smart board on here successfully in Windows, in spite of there being a toggle switch for this type of board.

There is someone in the DGT club on here reckons he's using a DGT e-board on chess.com. But I'm not sure how that can be true. If it were possible our friend Andrea would be doing it. ;o)
The best chess experience with a DGT board is to be had with Acid Ape Chess on Android playing on Lichess.

Khadim's White Pawn (Android version) and Bik's Chess for Android should also work
I know, I've been for a short time a beta tester also for White Pawn app. I absolutely sympathize with both Khadim and Aart, however we have to admit and appreciate the fact that neither WP nor CfA are by no means not even close to what AAC is under pretty much all aspects. Of course, AAC is not free, while the other two are. If only AAC could connect to chess.com :-( !!
Hey Guys, i'm wondering if it's possible to have DGT Smart Board (plastic and USB only) connect to Chess.com Android App. Would love to have it working. Does anyone knows about it?