Car batteries are quite complex, and can have a multitude of problems internally. Failing to start up, corroding connections, and clicking noises are various common car battery problems.
The most common problem from what I can tell is battery failure. This car needs a much stronger battery than a normal car, and they are still working out the technical side of this.
A dead or weak battery is one of the more common reasons for a car to experience electrical problems. A bad alternator, blown fuse, or broken wire are other common causes.
my battery is good but having problems with starting
Yep, will not start.
Dead battery, car will not start
Problems starting a car can be due to one of many reasons, including a problem with the car battery.
try checking the battery cables
It might have some other problems on the motor or any other place in the car.
you can hook a car radio directly to a car battery or even a car battery charger with out problems, I have done it myself, the only thing to remember is that it needs to have 12 volts and the polarity (+ -) needs to be correct.
The battery can located anywhere on the car. Common locations are under the hood, in The trunk, and under a seat.
They are easily damaged by people and most people don't buy the right kind for their car.
assuming the battery isn't just dead try yanking on the battery cables and see if you get some life. The most common cause of no power is battery cables.