Can I use any Ni-MH AAA for my cordless phone?

[GGD]

From looking at this site for battery compatibility, it appears that the HHR-4DPA is just a standard AAA battery and you should be able to use an off the shelf battery. This is good news for you, but uncommon, many cordless phones use a battery pack with the cells wired together and shrink wrapped with a wire cord coming out and a special connector.

http://www.ultralastgreen.com/battery-ma...ge=details&model=UL132&manufacturer=Panasonic&device_model=0&device_battery_model=HHR-4DPA&category_id=4&subcategory_id=4