{"product_id":"noco-boost-x-gbx45-1250a-lithium-jump-starter","title":"NOCO Boost X GBX45 1250A Lithium Jump Starter and USB Power Bank","description":"\u003cp class=\"nvn-hero\"\u003eThe NOCO Boost X GBX45 is a compact lithium jump starter that punches way above its size. 1250 peak amps starts gas engines up to 6.5 liters and diesels up to 4 liters, and it doubles as a USB-C power bank and LED flashlight. Toss it in a cockpit locker and you've got a dead-battery insurance policy that fits in one hand.\u003c\/p\u003e\n\n\u003cdiv class=\"nvn-description\"\u003e\n\u003cp\u003eEvery boater has been there. You turn the key and get a single click, or worse, dead silence. The NOCO Boost X GBX45 exists for exactly that moment. It's a lithium jump starter about the size of a paperback that holds enough punch to bring a stone-dead battery back to life. 1250 peak amps is plenty for gas engines up to 6.5 liters, and it'll turn over a diesel up to 4 liters. That covers the vast majority of what's bolted into recreational boats, from outboards to small inboard diesels.\u003c\/p\u003e\n\u003cp\u003eWe keep one in the console on our own boat, and it's earned its spot more than once. The workflow is simple. Clip the included jumper cables onto the battery, red to positive and black to negative, and the Boost X handles the rest. There's no guessing about polarity because the unit won't send current until it sees a proper connection. So you can hand it to a first-time owner without worrying they'll cross the leads and throw sparks. The clamps are HD precision terminals that grip marine battery posts properly, not the flimsy stamped clips you find on cheap boosters. When you're done, wind the cables up and drop it back in the microfiber bag it ships with.\u003c\/p\u003e\n\u003cp\u003eBut this isn't only a jump starter. The GBX45 is a genuine power bank too. It carries a 31 watt-hour lithium-ion pack and three ways to get power back out: a 12-volt DC output, a USB-A port that pushes 5 to 12 volts, and a USB-C port that ranges from 5 all the way to 20 volts. That USB-C port is the one that matters. It's quick enough to top off a phone, a handheld VHF, a tablet running your charts, or even a small laptop on a long day offshore. The same port recharges the unit itself in about 48 minutes when you feed it enough wattage, so a quick stop at the dock before you leave gets you topped up. Built into the front is an LED flashlight with the usual emergency modes, which is exactly what you want when you're crawling into an engine bay after dark.\u003c\/p\u003e\n\u003cp\u003eA few honest notes from living with these around salt water. Lithium packs don't love heat or humidity, so don't leave it baking in a closed compartment all season. Store it somewhere dry, ideally in a sealed bag or a locker with some air flow, and top it off every couple of months so it's ready when you actually need it. Keep the USB ports covered when they're not in use. A little salt spray on exposed contacts is the enemy of any electronics on board. On a planing hull that pounds through chop, tuck it in with a bit of foam padding so it isn't rattling around loose. Treat it like the safety gear it is and it'll be there on the morning your battery isn't.\u003c\/p\u003e\n\u003cp\u003eOne thing we'll be straight about: cold diesels are the toughest test for any jump starter this size. The GBX45's 1250 amps will spin a warm 4-liter diesel without drama, but a genuinely cold diesel that wants a full glow-plug cycle is asking a lot of any compact pack. If you run a diesel auxiliary, give the glow plugs their time before you crank, and don't be surprised if a stubborn engine needs a second go. For gas engines up to 6.5 liters, that's rarely a concern.\u003c\/p\u003e\n\u003cp\u003eSo who's this for? Center console owners, RIB and dinghy operators, sailors with a small diesel auxiliary, anyone running a single battery who wants a backup that doesn't eat half a locker. The X in Boost X means faster recharging and more starts per charge than the standard Boost line. This is the version without an air compressor, so if you also want to air up fenders or a dinghy on the fly, look at a model that includes one. For pure starting muscle and USB charging in a package you can hold in one hand, the GBX45 is tough to beat. And at this price, it's cheap insurance against a ruined day.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul class=\"nvn-features\"\u003e\n  \u003cli\u003e1250 peak amps starts gas engines up to 6.5 liters and diesel engines up to 4 liters\u003c\/li\u003e\n  \u003cli\u003e31 watt-hour lithium-ion pack delivers multiple jump starts on a single charge\u003c\/li\u003e\n  \u003cli\u003eUSB-C port ranges 5 to 20 volts to fast-charge phones, tablets, handheld VHF, and small laptops\u003c\/li\u003e\n  \u003cli\u003eUSB-A port outputs 5 to 12 volts for legacy devices and accessories\u003c\/li\u003e\n  \u003cli\u003e12-volt DC output port powers 12V gear directly\u003c\/li\u003e\n  \u003cli\u003eRecharges in about 48 minutes with adequate USB-C input wattage\u003c\/li\u003e\n  \u003cli\u003eSpark-proof connection and reverse-polarity protection let anyone use it safely\u003c\/li\u003e\n  \u003cli\u003eBuilt-in LED flashlight with emergency light modes for after-dark engine work\u003c\/li\u003e\n  \u003cli\u003eHD precision battery terminal clamps included for a solid grip on marine posts\u003c\/li\u003e\n  \u003cli\u003eShips with a 24-inch USB-A to USB-C cable and a microfiber storage bag\u003c\/li\u003e\n  \u003cli\u003eCompact one-hand size fits a console cubby or cockpit locker\u003c\/li\u003e\n  \u003cli\u003eNo air compressor on this version, keeping weight and bulk down\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cdiv class=\"nvn-trust\"\u003e\n  \u003ch2\u003eWhy Buy from NVN Marine\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003eAuthorized NOCO reseller, full manufacturer warranty\u003c\/li\u003e\n    \u003cli\u003eNMEA member and ABYC certified, advice from real boat techs\u003c\/li\u003e\n    \u003cli\u003eSame-day shipping before 3 PM ET on in-stock items\u003c\/li\u003e\n    \u003cli\u003eNY headquarters and Fort Lauderdale flagship retail store\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cdiv class=\"nvn-faq\"\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat size engines can the GBX45 start?\u003c\/summary\u003e\n    \u003cp\u003eIt's rated to start gas engines up to 6.5 liters and diesel engines up to 4 liters, which covers the vast majority of outboards and small inboards on recreational boats.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow many jump starts do I get per charge?\u003c\/summary\u003e\n    \u003cp\u003eThe 31 watt-hour lithium-ion pack is good for multiple starts on a single charge. Exact count depends on engine size and how deeply your battery is drained, but it's built for more than one crank per charge.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eCan I use it to charge my phone or handheld VHF?\u003c\/summary\u003e\n    \u003cp\u003eYes. It's a full power bank with a 12-volt DC output, a 5 to 12 volt USB-A port, and a 5 to 20 volt USB-C port. The USB-C port is quick enough for phones, tablets, handheld VHF radios, and small laptops.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow long does it take to recharge?\u003c\/summary\u003e\n    \u003cp\u003eAbout 48 minutes when you feed the USB-C port enough input wattage. A quick top-off at the dock before you head out gets it ready to go.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs it safe if I hook the clamps up backwards?\u003c\/summary\u003e\n    \u003cp\u003eYes. It has spark-proof connection and reverse-polarity protection, so it won't send current until it sees a proper connection. You can hand it to a first-time owner without worrying about crossed leads.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eDoes this version have an air compressor?\u003c\/summary\u003e\n    \u003cp\u003eNo. This is the no-compressor GBX45, which keeps the weight and bulk down. If you also want to inflate fenders or a dinghy, you'd want a different model that includes a compressor.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat's the difference between the Boost X and the regular Boost?\u003c\/summary\u003e\n    \u003cp\u003eThe Boost X line recharges faster and delivers more starts per charge than the standard Boost line. The GBX45 is part of that faster X family.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eHow should I store it on my boat?\u003c\/summary\u003e\n    \u003cp\u003eKeep it somewhere dry with some air flow, not baking in a sealed compartment all season. Top it off every couple of months so it holds a full charge, and keep the USB ports covered against salt spray when they're not in use.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWill it start a cold diesel?\u003c\/summary\u003e\n    \u003cp\u003eIt'll spin a warm 4-liter diesel without trouble. A genuinely cold diesel that needs a full glow-plug cycle is a tougher ask for any compact pack, so let the glow plugs finish their cycle before you crank.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eWhat comes in the box?\u003c\/summary\u003e\n    \u003cp\u003eThe GBX45 unit, jumper cables with HD precision battery terminal clamps, a 24-inch USB-A to USB-C cable, and a microfiber storage bag.\u003c\/p\u003e\n  \u003c\/details\u003e\n  \u003cdetails\u003e\n    \u003csummary\u003eIs there a warranty?\u003c\/summary\u003e\n    \u003cp\u003eYes. Full NOCO manufacturer warranty applies. We're an authorized NOCO reseller, so any warranty claim runs through us.\u003c\/p\u003e\n  \u003c\/details\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable class=\"nvn-specs\"\u003e\n  \u003ctbody\u003e\n    \u003ctr\u003e\n\u003cth\u003eTitle\u003c\/th\u003e\n\u003ctd\u003eNOCO Boost X GBX45 UltraSafe Lithium Jump Starter\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eNOCO\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003eGBX45\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e046221200065\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003ePeak Amps\u003c\/th\u003e\n\u003ctd\u003e1250 A\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBattery Capacity\u003c\/th\u003e\n\u003ctd\u003e31 Watt-Hours\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBattery Chemistry\u003c\/th\u003e\n\u003ctd\u003eLithium-Ion\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eGas Engine Rating\u003c\/th\u003e\n\u003ctd\u003eUp to 6.5 Liters\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDiesel Engine Rating\u003c\/th\u003e\n\u003ctd\u003eUp to 4 Liters\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eRecharge Time\u003c\/th\u003e\n\u003ctd\u003e48 Minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUSB-C Port\u003c\/th\u003e\n\u003ctd\u003e5V to 20V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eUSB-A Port\u003c\/th\u003e\n\u003ctd\u003e5V to 12V\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eDC Output\u003c\/th\u003e\n\u003ctd\u003e12 Volt\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eAir Compressor\u003c\/th\u003e\n\u003ctd\u003eNot included on this version\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eBuilt-In Light\u003c\/th\u003e\n\u003ctd\u003eLED Flashlight\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003ctr\u003e\n\u003cth\u003eIncluded Accessories\u003c\/th\u003e\n\u003ctd\u003eJumper cables with HD precision battery terminal clamps, 24 inch USB-A to USB-C cable, microfiber storage bag\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n    \"@context\": \"https:\/\/schema.org\",\n    \"@type\": \"FAQPage\",\n    \"mainEntity\": [\n        {\n            \"@type\": \"Question\",\n            \"name\": \"What size engines can the GBX45 start?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It's rated to start gas engines up to 6.5 liters and diesel engines up to 4 liters, which covers the vast majority of outboards and small inboards on recreational boats.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How many jump starts do I get per charge?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"The 31 watt-hour lithium-ion pack is good for multiple starts on a single charge. Exact count depends on engine size and how deeply your battery is drained, but it's built for more than one crank per charge.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Can I use it to charge my phone or handheld VHF?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. It's a full power bank with a 12-volt DC output, a 5 to 12 volt USB-A port, and a 5 to 20 volt USB-C port. The USB-C port is quick enough for phones, tablets, handheld VHF radios, and small laptops.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"How long does it take to recharge?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"About 48 minutes when you feed the USB-C port enough input wattage. A quick top-off at the dock before you head out gets it ready to go.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Is it safe if I hook the clamps up backwards?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"Yes. It has spark-proof connection and reverse-polarity protection, so it won't send current until it sees a proper connection. You can hand it to a first-time owner without worrying about crossed leads.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Does this version have an air compressor?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"No. This is the no-compressor GBX45, which keeps the weight and bulk down. 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Top it off every couple of months so it holds a full charge, and keep the USB ports covered against salt spray when they're not in use.\"\n            }\n        },\n        {\n            \"@type\": \"Question\",\n            \"name\": \"Will it start a cold diesel?\",\n            \"acceptedAnswer\": {\n                \"@type\": \"Answer\",\n                \"text\": \"It'll spin a warm 4-liter diesel without trouble. 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