{"product_id":"stanley-j309-jump-starter-300a-600-peak-amps-12v-dc","title":"Stanley J309 Jump Starter 300A 600 Peak Amps 12V Dc","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe STANLEY J309 is a portable jump starter designed to deliver 300 cranking amps and 600 peak amps to dead or discharged 12-volt lead acid automotive batteries. Built for roadside and shop use, it provides a reliable starting boost without the need for a second vehicle. The unit includes a built-in 120 VAC charger to recharge the internal battery from a standard wall outlet, a high-powered LED work light, and a power and charge indicator so the technician knows the unit is ready before connecting to a vehicle. All metal powder-coated clamps are included for durable, corrosion-resistant cable connections.\u003c\/p\u003e\u003cp\u003eThe J309 is suited for use on passenger vehicles, light trucks, and similar 12-volt DC starting systems using lead acid battery chemistry. The integrated 12-volt DC outlet and USB outlet make it a multipurpose tool for field service technicians, fleet maintenance crews, and mobile mechanics who need jump-start capability alongside portable power for accessories and devices. A reverse polarity alarm alerts the user to incorrect clamp connections before any current flows, reducing the risk of damage to vehicle electronics.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e300 cranking amps and 600 peak amps for 12-volt lead acid battery jump starts\u003c\/li\u003e\n\u003cli\u003eBuilt-in 120 VAC charger for recharging the unit from a standard wall outlet\u003c\/li\u003e\n\u003cli\u003eHigh-powered LED light for low-light work environments\u003c\/li\u003e\n\u003cli\u003e12-volt DC outlet and USB outlet for powering accessories in the field\u003c\/li\u003e\n\u003cli\u003eReverse polarity alarm to prevent incorrect clamp connections\u003c\/li\u003e\n\u003cli\u003eAll metal powder-coated clamps for durability and corrosion resistance\u003c\/li\u003e\n\u003cli\u003ePortable design with a 8.75-pound package weight\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eDesigned for use with 12-volt DC lead acid battery systems commonly found in passenger vehicles and light trucks.\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eJump starters are typically deployed by automotive technicians and fleet service professionals. Before connecting the clamps, confirm the vehicle ignition is off and identify correct positive and negative battery terminals. Connect the positive clamp first, then negative, following standard jump-start sequencing to reduce arc risk. If the reverse polarity alarm activates, disconnect immediately and verify clamp placement before proceeding.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage\u003c\/strong\u003e: 12 volts DC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCranking Amps\u003c\/strong\u003e: 300 amps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak Amps\u003c\/strong\u003e: 600 amps\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC Output\u003c\/strong\u003e: 12 volts\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatible Battery Type\u003c\/strong\u003e: Lead Acid\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeight\u003c\/strong\u003e: 11.25 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWidth\u003c\/strong\u003e: 6 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength\u003c\/strong\u003e: 10.75 inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight\u003c\/strong\u003e: 8.75 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePortable\u003c\/strong\u003e: Yes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUNSPSC Code\u003c\/strong\u003e: 26111704\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: STANLEY\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: J309\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"STANLEY","offers":[{"title":"Default Title","offer_id":51540387004722,"sku":"J309","price":109.36,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/3be778020aaa841355d6084f5327326f.jpg?v=1785853929","url":"https:\/\/voomisupply.com\/products\/stanley-j309-jump-starter-300a-600-peak-amps-12v-dc","provider":"Voomi Supply","version":"1.0","type":"link"}