New patented technology that absorbs energy from a discharged battery to charge the jump-starter's condenser and then start the vehicle's engine. The jump-starter is consequently maintenance-free and can be kept uncharged in the car for years, and still provide start assistance in emergency situations as long as the car battery is not fully depleted. The jump-starter can also be charged via a 12 V socket or USB if you need to start a vehicle with a depleted or damaged battery.
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