{"product_id":"gooloo-s4-4a-smart-car-battery-charger-maintainer-6v-12v-lcd-desulfation","title":"GOOLOO S4 4A Smart Car Battery Charger \u0026 Maintainer — 6V\/12V, LCD, Desulfation","description":"\u003cp\u003e\u003cstrong\u003eGOOLOO S4 is a fully automatic 4A smart charger and maintainer for 6V and 12V lead-acid and 12V LiFePO4 batteries that charges, desulfates, and preserves batteries without overcharging.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eIf you own cars, motorcycles, lawn equipment, ATVs, or boats, the GOOLOO S4 is built to keep batteries healthy whether they’re in daily use or stored for months. This compact charger combines multi-stage smart charging, temperature compensation, and an LCD readout so you can monitor voltage, mode, and charge status. It works with common battery types—WET, SLA, GEL, AGM, FLOODED, VRLA—and also supports 12V LiFePO4 cells, making it a flexible shop or garage tool.\u003c\/p\u003e\n\n\u003ch3\u003eHow does the GOOLOO S4 revive weak batteries?\u003c\/h3\u003e\n\u003cp\u003eThe S4 includes an auto repair and pulse-current desulfation program that helps break down sulfate crystals and restore lost battery capacity. It uses a 10-stage intelligent charging algorithm that safely alternates charging phases to maximize recovery without overheating.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003ePulse current desulfation to address lead-acid sulfate build-up\u003c\/li\u003e\n  \u003cli\u003eCan begin charging batteries as low as 3 V\u003c\/li\u003e\n  \u003cli\u003e10-stage smart charging to balance speed and longevity\u003c\/li\u003e\n  \u003cli\u003eAutomatic transition to maintenance mode when charging completes\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it overcharge or damage batteries if left connected long-term?\u003c\/h3\u003e\n\u003cp\u003eNo—GOOLOO S4 is designed for continuous maintenance use. The unit automatically detects full charge and switches to float\/maintenance mode, preventing overcharge while preserving battery readiness over extended storage periods.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFloat\/trickle maintenance mode for long-term connection\u003c\/li\u003e\n  \u003cli\u003eAutomatic shutoff or maintenance transition to avoid overcharge\u003c\/li\u003e\n  \u003cli\u003eLCD indicates when the charger is in maintenance\u003c\/li\u003e\n  \u003cli\u003eSafe for daily and seasonal storage scenarios\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhich battery types and vehicles are compatible with this charger?\u003c\/h3\u003e\n\u003cp\u003eGOOLOO S4 supports a broad range of 6 V and 12 V lead-acid chemistries plus 12 V LiFePO4, so it fits small and large batteries across many vehicle types. Use it on cars, trucks, motorcycles, scooters, lawn mowers, ATVs, RVs, boats and more for routine charging or long-term care.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompatible with WET, SLA, GEL, AGM, FLOODED, VRLA batteries\u003c\/li\u003e\n  \u003cli\u003eSupports 12V LiFePO4 battery charging\u003c\/li\u003e\n  \u003cli\u003eWorks for automobiles, motorcycles, lawn equipment, ATVs, boats, RVs\u003c\/li\u003e\n  \u003cli\u003eSelectable 6V or 12V operation for small and mid-size batteries\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow does the charger adapt to different temperatures and conditions?\u003c\/h3\u003e\n\u003cp\u003eThe S4 includes temperature compensation to adjust charging voltage and protect batteries in hot or cold environments. That reduces the risk of undercharging in winter and overcharging during hot weather, helping batteries reach full charge safely.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eAutomatic temperature compensation for accurate charging voltages\u003c\/li\u003e\n  \u003cli\u003ePrevents undercharge in cold climates and overcharge in heat\u003c\/li\u003e\n  \u003cli\u003eLCD shows voltage and charging mode for easy monitoring\u003c\/li\u003e\n  \u003cli\u003eDurable, compact housing for garage or portable use\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The GOOLOO S4 is intended for drivers, hobbyists, fleet owners, and anyone who stores vehicles or equipment seasonally and wants reliable battery care. It’s helpful for homeowners maintaining lawn tractors and ATVs, motorcycle owners who store bikes over winter, and small-fleet operators needing dependable charging and battery recovery tools. Backed by an 18-month warranty and customer support, it’s a practical choice when you need a safe, intelligent 6V\/12V charger that doubles as a maintainer and desulfator.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can the GOOLOO S4 charge a completely dead battery?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, it can attempt charging from batteries as low as 3 volts using its recovery\/desulfation routine.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is the charger safe to leave connected long-term?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes, the S4 automatically switches to maintenance\/float mode to prevent overcharging during long-term connection.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"GOOLOO","offers":[{"title":"Default Title","offer_id":48079873605790,"sku":"B0919PGCNS","price":79.97,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/gooloo-s4-front-panel.jpg?v=1785773740","url":"https:\/\/northtrailauto.ca\/products\/gooloo-s4-4a-smart-car-battery-charger-maintainer-6v-12v-lcd-desulfation","provider":"North Trail Auto","version":"1.0","type":"link"}