{"product_id":"18650-battery-holder-single-cell-cylindrical-holder-for-diy-electronics","title":"18650 Battery Holder - Single Cell Cylindrical Holder for DIY Electronics","description":"\u003ch1\u003e18650 Battery Holder - Single Cell 3.7V Li-ion Battery Holder\u003c\/h1\u003e\u003cp\u003eThe 18650 battery holder is a single-cell cylindrical holder designed for standard 18650 lithium-ion batteries. It provides a secure connection for powering DIY electronics, robotics projects, and portable devices. This holder accepts unprotected and protected 18650 cells, offering reliable contact for your battery-powered applications.\u003c\/p\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBattery Type\u003c\/td\u003e\n\u003ctd\u003e1 x 18650 (cylindrical, 18mm x 65mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eABS plastic body with nickel-plated spring contacts\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eContact Type\u003c\/td\u003e\n\u003ctd\u003eSpring-loaded negative, solid positive terminal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWire Leads\u003c\/td\u003e\n\u003ctd\u003e15cm (6 inch) 22AWG red and black wires\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e80mm x 22mm x 22mm (L x W x H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch2\u003eWhat You Can Build With This\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003ePortable USB charger or power bank\u003c\/li\u003e\n\u003cli\u003eLED flashlight or camping lantern\u003c\/li\u003e\n\u003cli\u003eArduino-based wireless sensor node\u003c\/li\u003e\n\u003cli\u003eDIY Bluetooth speaker\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003cp\u003eThis holder works with standard 18650 cells (3.7V nominal). It connects easily to microcontrollers like Arduino, ESP32, and Raspberry Pi Pico via the included wires. For regulated 5V output, pair with a boost converter module; for charging, use a TP4056 charging board.\u003c\/p\u003e\u003ch2\u003eWiring Notes\u003c\/h2\u003e\u003cp\u003eConnect the red wire to the positive terminal and black to negative. Ensure correct polarity to prevent damage. If using with a boost converter, solder directly or use a connector. For projects requiring stable power, add a 100μF capacitor across the output.\u003c\/p\u003e\u003ch2\u003eWhy Buy from Compoden\u003c\/h2\u003e\u003cp\u003eEvery component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.\u003c\/p\u003e\u003cdetails\u003e\u003csummary\u003eIs this compatible with protected 18650 batteries?\u003c\/summary\u003e\u003cp\u003eYes, the holder accommodates both protected (button-top) and unprotected (flat-top) 18650 cells. Protected cells may fit snugly due to increased length.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eCan I recharge the battery while it's in the holder?\u003c\/summary\u003e\u003cp\u003eYes, you can recharge the battery using an external charger module like TP4056. Connect the charger's output to the holder's wires, ensuring polarity matches.\u003c\/p\u003e\u003c\/details\u003e\u003cdetails\u003e\u003csummary\u003eDoes this holder have a built-in protection circuit?\u003c\/summary\u003e\u003cp\u003eNo, this is a basic holder without protection. Add your own under-voltage cutoff or use a protected 18650 cell for safety.\u003c\/p\u003e\u003c\/details\u003e\n\u003cdiv class=\"compoden-handoff\" style=\"margin-top:24px;padding:16px;background:#f0f4ff;border-left:4px solid #2B4D8F;border-radius:4px;\"\u003e\n  \u003cp style=\"margin:0 0 6px 0;font-weight:600;color:#1A3560;\"\u003e📦 Free Setup Handoff Document Included\u003c\/p\u003e\n  \u003cp style=\"margin:0;font-size:0.95em;color:#333;\"\u003eEvery Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.\u003c\/p\u003e\n\u003c\/div\u003e\n","brand":"Compoden","offers":[{"title":"Default Title","offer_id":53445046108525,"sku":"CDN-0859","price":60.0,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0999\/3997\/5533\/files\/image_1_a3db6330-c829-4215-8543-ef1e3ba52c82.jpg?v=1781513045","url":"https:\/\/compoden.com\/products\/18650-battery-holder-single-cell-cylindrical-holder-for-diy-electronics","provider":"Compoden","version":"1.0","type":"link"}