If the problem is a weak battery and everything else is ok. Find the cause before you take a trip. if your alternator is not charging you will get stuck as soon as you stop the car.
use jumper cables Moran
Jumper Cables. If your battery has died, you may be able to use jumper cables to jump start it from some good Samaritan_Ü_s vehicle. If you can safely use jumper cables on your vehicle, make sure that the battery on the good Samaritan_Ü_s vehicle has at least as much voltage as your own.
You use a welder, not jumper cables!
bad battery or bad charger.
Use battery jumper cables
They don't. Jumper cables are used to charge a car battery. Hard drives have no use for such a device.
You can use jumper cables, but cars with automatics shouldn't be towed or pushed as an attempt to start them. It can damage the transmission.
To illustrate where to attach the jumper cables to the car battery
A8s in the 1997 to 2003 vintage all have batteries in the trunk. Open trunk, remove flat, carpeted cover plate from the right, rear corner of the trunk. Hook jumper cables to the exposed battery terminals. Use a flash light to ensure you identify the + & - terminals properly. The wiring colors are tricky in this case. USE THE FLASHLIGHT.
That depends upon what the starter problem is. If the battery is exhausted, you can use another vehicle's battery, with jumper cables.
Never use cables with wires exposed. The wires can ground to the vehicle, start a fire or worse case, electrocute you to death. There is enough current going through the cables during cranking to weld steel(100+amps).
The proper way to use jumper cables to boost a low/dead battery: (1) one end of positive jumper cable to "dead" battery; (2) opposite end of positive jumper cable to "good" battery; (3) one end of negative jumper cable to "good" battery; (4) opposite end of negative jumper cable to GROUND on "dead" vehicle. Remove jumper cables in reverse order.