“Car Battery” radios were designed to look like little car batteries with names, logos, and sometimes specifications. Each is approximately 4” long. Tuning and volume knobs are in place where terminals would be, and these hark back to when you had to fill them, so there are also removable caps! Gulf Oil Cruisemaster Car Battery AM Transistor Radio. Circa 1969. Mint condition, but not working, makes noise but no stations come in.CO-OP DIRECTOR Battery AM Transistor Radio. Circa 1960s. The radio is in excellent cosmetic, and working condition.THE RED CAMEL - EXIDE Car Battery AM Transistor Radio. Circa 1960s. Only one I ever found of this brand. The radio is in excellent cosmetic and working condition.