{"product_id":"e-fast-20a-smart-car-battery-charger-12v-24v-lifepo4-lead-acid-with-desulfator-7-stage-fast-charge","title":"E-FAST 20A Smart Car Battery Charger 12V\/24V — LiFePO4 \u0026 Lead-Acid with Desulfator, 7-Stage Fast Charge","description":"\u003cp\u003e\u003cstrong\u003eThe E-FAST 20A Smart Car Battery Charger is a high-power, microprocessor-controlled 12V\/24V charger and maintainer with dedicated LiFePO4 and lead-acid modes plus a pulse desulfation repair function.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eThis compact charger delivers fast, safe charging for a wide range of batteries used in cars, trucks, RVs, boats and agricultural equipment. With a 20A output on 12V systems (10A on 24V), seven-stage charging logic, auto-memory and active cooling, it’s designed to bring large-capacity batteries back to service and keep them at optimal state-of-charge without overcharging. The unit also includes a repair\/desulfation cycle to help recover sulfated lead-acid batteries and multiple built-in protections for unattended use.\u003c\/p\u003e\n\n\u003ch3\u003eHow quickly will this charger restore a flat battery?\u003c\/h3\u003e\n\n\u003cp\u003eThe E-FAST 20A charger provides rapid replenishment for large batteries. On 12V mode it supplies up to 20 amps, which can fully charge a 100Ah battery in roughly 5–6 hours under normal conditions—about twice as fast as many 10A chargers. For 24V battery banks the charger delivers 10A.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e20A max output for 12V, 10A for 24V\u003c\/li\u003e\n  \u003cli\u003eEstimate: 100Ah battery ≈ 5–6 hours from low state\u003c\/li\u003e\n  \u003cli\u003eSuitable for batteries up to 300Ah in capacity\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill it work with my lithium or lead-acid battery type?\u003c\/h3\u003e\n\n\u003cp\u003eYes—this charger is programmed for both LiFePO4 lithium batteries and multiple lead-acid chemistries. Choose the correct mode for LiFePO4, AGM, GEL, SLA, wet or deep-cycle batteries and the charger will apply tailored voltage and charge profiles to protect battery health. The Auto-Memory feature remembers your last selection for convenience across sessions.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eDedicated LiFePO4 algorithm to protect lithium cells\u003c\/li\u003e\n  \u003cli\u003eLead-acid support: AGM, GEL, SLA, wet, deep-cycle\u003c\/li\u003e\n  \u003cli\u003eAuto-Memory stores last selected charging mode\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCan it revive an old or sulfated battery?\u003c\/h3\u003e\n\n\u003cp\u003eThe charger includes a Repair Mode that uses pulse desulfation to help break down sulfate buildup on lead-acid battery plates. This 16-hour cycle is intended to restore capacity to idle or stratified batteries that suffer from sulfation, potentially extending service life and delaying replacement. Results vary by battery condition and age.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eRepair Mode: advanced pulse desulfation cycle\u003c\/li\u003e\n  \u003cli\u003e16-hour dedicated repair program for lead-acid batteries\u003c\/li\u003e\n  \u003cli\u003eBest for batteries with early-stage sulfation or long storage discharge\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eIs the charger safe to leave connected overnight or during storage?\u003c\/h3\u003e\n\n\u003cp\u003eYes—the E-FAST 20A offers comprehensive protections and smart maintenance stages so it can be used for long-term maintenance. Over-charge, reverse polarity, short-circuit and over-temperature safeguards protect both the battery and the charger. An internal cooling fan helps dissipate heat during high-amp operation.\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003eSeven-stage microprocessor charging prevents overcharging\u003c\/li\u003e\n  \u003cli\u003eBuilt-in protections: reverse polarity, short circuit, over-temp\u003c\/li\u003e\n  \u003cli\u003eActive cooling fan for sustained 20A performance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: The E-FAST 20A charger is intended for vehicle owners and technicians who need faster, smarter charging for medium-to-large battery banks—owners of trucks, RVs, boats, marine electronics, agricultural machines and deep-cycle systems. It’s a good fit when you require versatile compatibility (LiFePO4 and multiple lead-acid chemistries), routine maintenance over long storage periods, or the ability to attempt recovery of sulfated lead-acid batteries. Choose this unit when you want higher charging current, automated charging intelligence and safety features for unattended charging sessions.\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: Does this charger support LiFePO4 batteries?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. It has a dedicated LiFePO4 charging algorithm designed to safely charge and maintain LiFePO4 12V\/24V batteries.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I leave it connected long-term as a maintainer?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. The seven-stage smart charging and protections allow safe long-term maintenance without overcharging.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"E-FAST","offers":[{"title":"Default Title","offer_id":67585922695353,"sku":"B0G1YH6QFQ","price":119.28,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0822\/3765\/3177\/files\/e-fast-front-panel.jpg?v=1790480039","url":"https:\/\/redleafauto.ca\/products\/e-fast-20a-smart-car-battery-charger-12v-24v-lifepo4-lead-acid-with-desulfator-7-stage-fast-charge","provider":"Redleaf Auto","version":"1.0","type":"link"}