I have to assume that you're talking about a 6volt battery.
The answer completely depends on the size and capacity of the battery.
If it's a 6volt car battery that's fully charged when you connect the radio
to it, it ought to run that radio for days. If it's a stack of four AA-cells in
series, they won't last quite that long.
You will have to purchase a power supply with a 12 volt DC output capable of handling the current draw of the car radio. Try "google" to find the manufacturer's specification sheet for the radio. In the specs. will be the amp draw of the radio. With this information you will know what amperage the output of the power supply needs to be.
The radio that is installed in the car.
If it has recently been wired in it has probibly not been wired in correctly. There are normally two power points for a car radio, one constant and another that works only when the ignition is on. By the sounds of it, it is wired into the constant power source, hence not switching off with the ignition.
Your antenna lead-in is broken, and the radio isn't getting any signal. That's why it keeps scanning and can't hear anything. Check the connection from the antenna to the cable, and if that's OK, then you'll have to replace the cable from the antenna to the radio. You did connect the antenna to it when you were checking it in the first car, right ? You can quickly test this hypothesis: With a radio in the first car, where no radio works, connect the power, but don't connect the car's antenna to it. Instead, stick the end of a different piece of wire ( 3 to 6 ft long) into the center hole of the antenna connector on the radio, and see if that makes it possible for the radio to start hearing things.
IGNITION SWITCH, UR RADIO'S SECONDARY POWER COMES FROM THE IGNITION SWITCH SO WHEN U TURN YOUR CAR OFF THE RADIO AND OTHER ACCESSORIES TURN OFF AS WELL.
Yes it will, in the 12-volt position. But with the information given in the question, we can't estimate how long it will take.
You left the door open to long and the battery went dead or you blew a fuse.
Yes, a radio requires very little power to operate.
Try grounding the radio to your car. It's that empty hole in the back that says GND.
Do you lose power when you turn the radio on? Probably electrical
You have enough battery power to power the radio, but not enough to turn over your engine. CHeck battery.
The options for car radio antennas include internal car antennas, external car antennas, power antennas, and satellite antennas. The internal antenna is the least effective and most cars come with either the external fixed antenna or the power antenna unless their is a satellite radio in the car and then it is a satellite antenna.
XM radio is great for long trips due to the hundreds of stations.
You will have to purchase a power supply with a 12 volt DC output capable of handling the current draw of the car radio. Try "google" to find the manufacturer's specification sheet for the radio. In the specs. will be the amp draw of the radio. With this information you will know what amperage the output of the power supply needs to be.
A good wire gauge for car radios is 18 gauge. This wire runs between the radio and its power supply from the vehicle.
If you check the radio it should say the red wire is for "switched" power and the yellow wire is for constant power the car is turning off the power to the memory of the radio you need to find a constant power for the yellow wire..
It is part of the security on the car, if someone pulled the radio they could never get it to work. When the car loses power, it resets. The code is in your owner's manual for your car.