Jump-starting a car means providing a brief boost of power to the vehicle’s 12V battery so the engine can turn over and run. You can do this with a portable jump starter (often called a jump box) or with jumper cables connected to another vehicle. Portable units sold on Walmart.com store energy and deliver a short burst of current through clamps attached to your battery. Once the engine starts, the vehicle’s charging system typically keeps it running. Always follow the instructions for your specific device and your vehicle’s manual, and avoid sparks by connecting clamps in the recommended order.

You’ll see a few names, and they’re commonly used to describe similar 12V tools:

• Jump starter: A portable battery pack designed to start a vehicle.
• Jump box/Jump pack: Casual names for a portable jump starter.
• Battery booster/Booster pack: Another way to describe a jump starter.

Names vary, but what matters are the specs: peak/start amps, supported engine sizes (gas vs. diesel), and extras like an air compressor, LED light, or USB‑C Power Delivery. On Walmart.com, these terms appear interchangeably; use filters to compare features and confirm compatibility in the product details.

Match the jump starter to your vehicle and conditions:

1. Engine size and type: Specs often list “up to X.XL gas/XXL diesel.” Choose one that meets or exceeds your engine.
2. Amps: Higher peak amps can help with larger engines or cold starts; compare peak and starting ratings when provided.
3. Voltage: Most passenger vehicles use 12V. Make sure the jump starter is compatible with your system.
4. Climate: In very cold weather, selecting a higher‑capacity unit can be helpful.
5. Features: Decide if you want an air compressor (commonly up to 150 PSI), USB‑C PD charging, or a built‑in light.

Review each product description on Walmart.com for exact compatibility and recommendations.

Portable jump starters are straightforward, but take care:

1. Charge the unit fully and read its instructions.
2. Turn off the vehicle and accessories.
3. Connect the red clamp to the battery’s positive (+) terminal.
4. Connect the black clamp to a clean, unpainted metal point on the engine/chassis (or as your manuals direct).
5. Power on the jump starter if required, then try starting in short bursts.
6. When the engine starts, remove clamps in reverse order and let the engine run.

Keep clamps from touching, stay clear of moving parts, and avoid prolonged cranking. If the vehicle doesn’t start after a few attempts, pause and consult the device and vehicle manuals for guidance.

Many jump starters double as handy roadside tools. Depending on the model, you may find:

• Air compressor: Built‑in inflators with digital gauges and auto shut‑off, often rated up to around 150 PSI for topping up tires.
• Power bank functions: USB‑A ports and USB‑C Power Delivery for charging phones, tablets, and some laptops.
• Work/flash lights: Multi‑mode LEDs for visibility during emergencies.
• Displays and safety clamps: Screens or indicators and smart cables to help with correct connections.

Use filters on Walmart.com to shop by features and check pickup or delivery options at checkout. Always confirm the product specs to make sure it fits your needs.