{"title":"3 x 18650 Battery Holder with DC2.1 Power Jack","handle":"3-x-18650-battery-holder-with-dc2-1-power-jack","url":"/products/3-x-18650-battery-holder-with-dc2-1-power-jack","description":"A robust battery holder designed to house three 18650 lithium-ion cells in series, delivering a nominal 11.1V output through a standard DC 2.1mm power jack. Ideal for powering projects, robots, and portable electronics that require higher voltage from rechargeable cells.\n\nThe holder features a durable ABS shell with nickel-plated stainless steel spring contacts for reliable electrical connections. The integrated DC barrel jack (5.5mm outer / 2.1mm inner) makes it easy to plug into compatible development boards and devices.\n\nKey Features\n\n\n3× 18650 Series Configuration – Provides nominal 11.1V output (3.7V per cell)\n\nDC 2.1mm Power Jack – Standard 5.5mm outer / 2.1mm inner barrel connector for broad compatibility\n\nDurable ABS Construction – Lightweight yet sturdy enclosure\n\nNickel-Plated Spring Contacts – Stainless steel springs ensure reliable, low-resistance connections\n\nRoHS Compliant – Meets environmental safety standards\n\n\nSpecifications\n\n\nBattery Type – 3× 18650 (not included)\n\nOutput Voltage – 11.1V nominal (series configuration)\n\nConnector – DC barrel jack, 5.5mm outer / 2.1mm inner\n\nMaterial – ABS shell, nickel-plated stainless steel springs\n\nDimensions – 78.24 × 59.46 × 21.41mm\n\nWeight – 30g (without batteries)\n\n\nIdeal For\n\nRobotics and portable electronics projects\nPowering Arduino, Raspberry Pi, and other development boards via DC jack\nField-deployable sensor systems and data loggers\nAny application requiring a rechargeable 11.1V power source\n\n\nPackage Contents\n\n1× 3-Cell 18650 Battery Holder with DC 2.1mm Jack\n\n\n\nNote: 18650 batteries are not included. Ensure all cells are matched (same brand, capacity, and charge level) when used in series to avoid imbalanced discharge.\n","vendor":"DFRobot","product_type":"physical","in_stock":false,"options":[],"variants":[{"id":8229,"title":"Default Title","sku":"DF-FIT0539","price":4.14,"on_sale":false,"in_stock":false,"available_quantity":0,"option1":"Default Title"}]}