There is also an output for the dial light on the 600 series. Other receiver brands include the Hallicrafters TW-1000 and TW-2000, RCA 3BX671 and 3BX672, and Stromberg Carlson AWP-8. Battery life of replaceable D cells is about 80 - 90 hours depending on receiver type and condition.
Rechargeable cells may also be used. Operate your receiver without the noise of the AC power line. The item "Zenith Transoceanic Trans-Oceanic Antique Tube Radio Battery" is in sale since Monday, July 1, 2019.
This item is in the category "Collectibles\Radio, Phonograph, TV, Phone\Radios\Tube Radios\1950-59". The seller is "abbattery" and is located in Mount Holly, New Jersey. This item can be shipped to United States, all countries in Europe, Canada, Japan, Australia.