Yes, however, if you have any servos connected you will need a substantial switching power supply because Servos draw a LOT of amps when they first start moving. If you use a cheap "Wall Wart" type supply, you will have brownouts and the EZ-B will reboot every time you move a servo.

Here is a thread with some links to appropriate devices.

https://synthiam.com/Community/Questions/8344

Alan

I have a 7.2 volt 2000 mah NiCad battery hooked to a "Y" cable. One end of the cable is connected to the EZB, the other end is connected to the wall charger. I use it to run test programs and a Fortune Teller cabinet I built. There are only a few servos which run for short times. The battery takes care of the inrush requirements, and runs the EZB with no problem. What works well for me is the charger keeps the battery charged. If your load is higher, a 5000 mah battery can be used but the recovery recharge time will have to be considered, or a larger charger used. (Regulated charger is advised.)

If the robot needs to be tested independently the battery alone can be used.

Ron

Here's my tutorial. Covers the science behind choosing power supplies and options.

Might be a little dated though. Power Supplies-Types, and Ez-robot Use