{"product_id":"5v-to-21v-boost-charging-cable-dc-interface-usb-adapter","title":"5V to 21V Boost Charging Cable DC Interface USB Adapter","description":"\u003cp\u003eKeep your 21V battery-powered tools and devices topped up with this handy \u003cstrong\u003e5V to 21V Boost Charging Cable with DC Interface USB Adapter\u003c\/strong\u003e. Designed as a reliable replacement or spare, this cable steps up a standard 5V USB power source to the 21V output required by compatible battery packs — so you can charge on the go using any standard USB charger or power bank.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eUniversal Compatibility:\u003c\/strong\u003e Works with 21V battery packs that accept a 5V USB charging input via DC interface.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBoost Technology:\u003c\/strong\u003e Steps up 5V USB power to 21V output for seamless, efficient charging.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Construction:\u003c\/strong\u003e Made from sturdy plastic housing with a cable length of approximately 73 cm — long enough for comfortable, flexible use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplacement Ready:\u003c\/strong\u003e Ideal for replacing worn, damaged, or lost charging cables without needing to replace the entire battery or charger.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Portable:\u003c\/strong\u003e Lightweight and easy to pack in a tool bag, backpack, or kit box.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Voltage:\u003c\/strong\u003e 5V (USB)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Voltage:\u003c\/strong\u003e 21V (DC Interface)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCable Length:\u003c\/strong\u003e Approx. 73 cm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplicable:\u003c\/strong\u003e 21V battery packs \/ 5V USB charging heads\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWhat's in the Box\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × 5V to 21V Boost Charging Cable with DC Interface USB Adapter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cem\u003eNote: The actual color of the item may vary slightly from product images due to differences in monitor brightness and display settings.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eFor general guidance on safe use of USB-based power accessories and charging standards, visit the U.S. Consumer Product Safety Commission (CPSC).\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does the 5V to 21V Boost Charging Cable USB Adapter do?\u003c\/h4\u003e\n\u003cp\u003eA: This boost charging cable steps up a standard 5V USB power input to a 21V DC output, allowing you to charge compatible 21V battery packs using any standard USB charger or power bank. It's a convenient and portable charging solution for tools and devices that use a 21V battery.\u003c\/p\u003e\n\u003ch4\u003eQ: What devices is this 5V to 21V USB Adapter compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This adapter is designed for use with 21V battery packs that support DC interface charging via a 5V USB source. It is commonly used as a replacement cable for cordless tool batteries and other 21V-compatible devices. Always verify your device's charging specifications before use.\u003c\/p\u003e\n\u003ch4\u003eQ: How long is the boost charging cable and what is it made of?\u003c\/h4\u003e\n\u003cp\u003eA: The cable measures approximately 73 cm in length and is constructed with a durable plastic housing, making it lightweight yet sturdy enough for everyday use and easy to carry in a tool bag or backpack.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does the 5V to 21V Boost Charging Cable USB Adapter do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This boost charging cable steps up a standard 5V USB power input to a 21V DC output, allowing you to charge compatible 21V battery packs using any standard USB charger or power bank. 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