{"product_id":"dc-5v-21a-diy-mobile-power-board-18650-charge-discharge-boost-module","title":"DC 5V 2.1A DIY Power Board 18650 Charge Discharge Boost Module","description":"\u003ch2\u003eDC 5V 2.1A DIY Mobile Power Board — 18650 Lithium Battery Charge\/Discharge Boost Module\u003c\/h2\u003e\n\u003cp\u003eBuild your own portable power bank or custom electronics project with this versatile \u003cstrong\u003eDC 5V 2.1A DIY Mobile Power Board\u003c\/strong\u003e. Designed for 3.7V lithium 18650 cells, this all-in-one integrated module handles charging (up to 4.2V), boost discharge output (5V\/2.1A), battery protection, and a built-in charge indicator — everything you need in a compact, single-board solution.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're a hobbyist, maker, or electronics enthusiast, this module streamlines your DIY power supply builds with reliable circuitry and multiple available styles to match your specific project needs.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5V \/ 2.1A Output:\u003c\/strong\u003e Boost converter delivers a stable 5V DC output at up to 2.1A — ideal for charging USB devices and powering microcontrollers.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4.2V Lithium Charging:\u003c\/strong\u003e Safely charges 3.7V 18650 lithium cells up to 4.2V with built-in charge management.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAll-in-One Design:\u003c\/strong\u003e Combines charge, boost discharge, battery protection, and LED indicator functions on a single board.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMultiple Style Options:\u003c\/strong\u003e Available in a wide range of configurations — including 18650 discharge boards, TP4056 kits, 5V output modules, Li-ion protection boards, charge\/discharge combo modules, and more.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eElectrostatic Bag Packaging:\u003c\/strong\u003e Shipped in an anti-static bag to protect sensitive components during transit.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Lightweight:\u003c\/strong\u003e Small form factor fits easily into custom enclosures and DIY project housings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eModule Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Voltage:\u003c\/strong\u003e 5V DC (USB)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Voltage:\u003c\/strong\u003e 5V DC (boosted)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOutput Current:\u003c\/strong\u003e Up to 2.1A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery Compatibility:\u003c\/strong\u003e 3.7V lithium 18650 cells (charged to 4.2V)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e 5V Charging and Discharging Integrated Module\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePackage:\u003c\/strong\u003e Electrostatic (anti-static) bag\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCertification:\u003c\/strong\u003e None\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eStyle Variants Available\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e18650 Discharge Board\u003c\/li\u003e\n  \u003cli\u003e4.2V Charge Protection Board\u003c\/li\u003e\n  \u003cli\u003eCharge Discharge Module\u003c\/li\u003e\n  \u003cli\u003eCharging Protection Module for 18650\u003c\/li\u003e\n  \u003cli\u003e18650 5V Output Board \/ Module\u003c\/li\u003e\n  \u003cli\u003e18650 Charger Board Module\u003c\/li\u003e\n  \u003cli\u003e18650 Protection Module\u003c\/li\u003e\n  \u003cli\u003e18650 2A Charge Module\u003c\/li\u003e\n  \u003cli\u003eTP4056 Kit\u003c\/li\u003e\n  \u003cli\u003eLi-ion Protection Board 5V\u003c\/li\u003e\n  \u003cli\u003ePD GC4 Module\u003c\/li\u003e\n  \u003cli\u003eAnd more — see variant selector above\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePerfect For\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY portable power bank builds\u003c\/li\u003e\n  \u003cli\u003eArduino, Raspberry Pi, and microcontroller power supply projects\u003c\/li\u003e\n  \u003cli\u003eCustom battery-powered electronics enclosures\u003c\/li\u003e\n  \u003cli\u003eMaker spaces, electronics labs, and hobbyist workshops\u003c\/li\u003e\n  \u003cli\u003ePrototyping and educational electronics projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor general guidance on safe lithium battery handling in DIY electronics, visit the U.S. Consumer Product Safety Commission (CPSC) – Lithium Battery Safety.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What does the DC 5V 2.1A DIY Mobile Power Board do?\u003c\/h4\u003e\n\u003cp\u003eA: This all-in-one module combines four functions on a single PCB: it charges a 3.7V 18650 lithium cell up to 4.2V, boosts the battery output to a stable 5V DC at up to 2.1A, provides built-in battery protection (overcharge\/over-discharge\/short circuit), and includes an LED charge status indicator — making it ideal for DIY power bank and portable electronics builds.\u003c\/p\u003e\n\u003ch4\u003eQ: Which 18650 battery types are compatible with this module?\u003c\/h4\u003e\n\u003cp\u003eA: This board is designed for standard 3.7V lithium-ion 18650 cells. It charges them safely to 4.2V. Always use quality, protected or unprotected 18650 cells from reputable sources, and follow proper lithium battery handling guidelines for safe DIY operation.\u003c\/p\u003e\n\u003ch4\u003eQ: What projects can I build with this charge\/discharge boost module?\u003c\/h4\u003e\n\u003cp\u003eA: This module is widely used in DIY portable power banks, custom USB charging stations, Arduino and Raspberry Pi battery power supplies, wearable electronics, and any maker project requiring a compact, self-contained 5V lithium battery management solution.\u003c\/p\u003e\n\u003ch4\u003eQ: How is this module shipped and packaged?\u003c\/h4\u003e\n\u003cp\u003eA: Each module is packaged in an electrostatic (anti-static) bag to protect the sensitive electronic components from electrostatic discharge (ESD) during shipping and handling.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What does the DC 5V 2.1A DIY Mobile Power Board do?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This all-in-one module combines four functions on a single PCB: it charges a 3.7V 18650 lithium cell up to 4.2V, boosts the battery output to a stable 5V DC at up to 2.1A, provides built-in battery protection (overcharge\/over-discharge\/short circuit), and includes an LED charge status indicator — making it ideal for DIY power bank and portable electronics builds.\"}}, {\"@type\": \"Question\", \"name\": \"Which 18650 battery types are compatible with this module?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This board is designed for standard 3.7V lithium-ion 18650 cells. 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