Ok, so you're talking about the Ektra smartphone. Connect it via USB to your PC, then on the phone, swipe down the notification panel and tap the USB notification. Make sure it's set to MTP or File Transfer. On the PC, open Windows File Explorer and open the phone there. You should be able to drag and drop files from the phone to the PC easily. Photos taken by the camera app should be in the /DCIM/Camera directory.
Batteries will of course use the same technology and probably the same kinds of connections, but the challenge would be finding one that fits correctly inside the phone.