When selecting a jump starter, consider the following practical criteria:
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Cranking capability: Check the peak and recommended cranking amps and compare them to your vehicle’s engine size. Larger engines generally need higher cranking current.

Safety protections: Look for reverse-polarity protection, spark-proof clamps, and thermal or over-current cutoffs.

Build and warranty: A durable housing, clear instructions, and a reasonable warranty are worth paying for—especially if you rely on the device for work or travel.

Extra features: USB outputs, built-in lights, and compact design are useful but secondary to reliable starting performance.