{"product_id":"dual-slot-3a-fast-charger-18v-21v-lithium-battery-power-tool","title":"Dual-Slot 3A Fast Charger for 18V \u0026 21V Lithium Batteries","description":"\n\u003ch2\u003eCharge Two 18V\/21V Lithium Batteries at Once — Fast \u0026amp; Efficiently\u003c\/h2\u003e\n\u003cp\u003eKeep your power tools running without downtime. This \u003cstrong\u003e3A Dual-Slot Fast Charger\u003c\/strong\u003e is built for 18V and 21V lithium-ion batteries, including BL1415, BL1815, BL1830, and BL1850 models. With two independent charging bays and a 3A output, you can charge two batteries simultaneously and get back to work faster than ever.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're a contractor on a job site or a weekend DIYer tackling home projects, this charger delivers reliable, consistent power replenishment with clear LED status indicators so you always know the charge state at a glance.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDual 2-Way Charging Bays:\u003c\/strong\u003e Charge two 18V or 21V lithium-ion batteries at the same time\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e3A Fast Charge Output:\u003c\/strong\u003e Quickly tops up your batteries so tools stay ready\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Voltage Input:\u003c\/strong\u003e AC 110–240V — compatible with both EU and US power standards\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eEU\/US Plug Options:\u003c\/strong\u003e Choose the plug type that suits your region\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLED Status Indicators:\u003c\/strong\u003e Green = powered\/full; Red = charging — always know your battery status at a glance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Models:\u003c\/strong\u003e BL1415, BL1815, BL1830, BL1850 and equivalent 18V\/21V lithium-ion battery packs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e80cm Cable Length:\u003c\/strong\u003e Generous cord reach for flexible use on the workbench or job site\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAC 110–240V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDC 18V \/ 21V — 3A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatible Batteries\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18V \/ 21V Lithium-Ion (BL1415, BL1815, BL1830, BL1850)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCharging Slots\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 (dual-way simultaneous)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCable Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e80cm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePlug Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEU \/ US (optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e200 × 115 × 65mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMade in Mainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1× Dual-Slot 3A Battery Charger (battery not included)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: Battery not included. Please allow 1–2cm variance due to manual measurement. Actual color may vary slightly from product images due to lighting and screen differences.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch3\u003eYou May Also Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/nitrile-work-gloves-anti-slip-full-finger-5-pair\"\u003e5-Pair Nitrile Work Gloves – Anti-Slip Full Finger Safety\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/10-pack-65mm-oscillating-multi-tool-saw-blades-high-carbon-steel\"\u003e10-Pack 65mm Oscillating Multi-Tool Saw Blades | Carbon Steel\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/adjustable-woodworking-compass-layout-gauge-carpenter\"\u003eAdjustable Woodworking Compass Layout Gauge for Carpenters\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.energystar.gov\/products\" target=\"_blank\" rel=\"noopener\"\u003eENERGY STAR product efficiency guidance\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Which battery models is this 18V\/21V charger compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This dual-slot fast charger is designed to work with 18V and 21V lithium-ion battery packs, specifically models BL1415, BL1815, BL1830, and BL1850. Always verify your battery's voltage and connector type before use.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Can I charge two batteries at the same time?\u003c\/h4\u003e\n\u003cp\u003eA: Yes! This charger features two independent charging bays, allowing you to charge two compatible 18V or 21V lithium-ion batteries simultaneously, reducing your downtime between jobs.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is this charger compatible with both US and EU outlets?\u003c\/h4\u003e\n\u003cp\u003eA: Absolutely. The charger accepts a wide input voltage range of AC 110–240V, and is available with either a US or EU plug — just select your preferred plug type when ordering.\u003c\/p\u003e\n\n\u003ch4\u003eQ: How do I know when my battery is fully charged?\u003c\/h4\u003e\n\u003cp\u003eA: The built-in LED indicator gives a clear status update: a green light means the unit is powered on, a red light indicates charging is in progress, and the light returns to green when the battery is fully charged.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Which battery models is this 18V\/21V charger compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This dual-slot fast charger is designed to work with 18V and 21V lithium-ion battery packs, specifically models BL1415, BL1815, BL1830, and BL1850. Always verify your battery's voltage and connector type before use.\"}}, {\"@type\": \"Question\", \"name\": \"Can I charge two batteries at the same time?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes! 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