You cannot assume that it is always the battery when your vehicle has problems starting. Sometimes it can be the starter motor, which works with the vehicle's ignition. If it is the starter, there are some warning signs that it may be in trouble.

If there is a grinding noise when attempting to start the car, then this can mean that the starter gear is worn. A whining noise can indicate that the starter gear is not connecting properly with the flywheel. The starter can sometimes get soaked with oil from an oil leak, which can cause it to fail eventually. If the solenoid is bad, then it cannot transmit electricity from the battery to the starter.