At one time, a set of jumper cables (and a fellow friendly motorist) was what you needed to jump-start a car. Today, all you need is a jump starter.
Jump starters are one of the best companions to any vehicle. They are portable battery devices that allow you to get your engine started when your battery can't. Battery starters are similar to jumper cables, except you do not need an additional vehicle to provide power to boost the dead vehicle battery! Just attach the jump starter's clamps to your battery and follow the unit's instructions.