Can the pedestal of digital cordless telephone be powered by batteries?
Yes, just look at what the power supply is, and if it's DC, you can use batteries instead of transformers such as transformers, DC5V, and dry cells. Each section is 1.5V and connected in sections of 3 or 4. Communication is out of the question.
Make sure that your phone has a working voltage of about volts and you can power it with the output voltage and the battery that the phone needs
You can see the sign on the transformer. As shown here, this is a DC 9V, which requires the 9/1.5=6 series of dry cells connected in series.
