{"product_id":"4s-20a-bms-protection-board-hx-4s-a20-rev-1-1-for-14-8v-16-8v-18650-li-ion-battery-packs","title":"4S 20A BMS Protection Board HX-4S-A20 Rev 1.1 for 14.8V 16.8V 18650 Li-ion Battery Packs","description":"\u003cp data-start=\"262\" data-end=\"630\"\u003eThe \u003cstrong data-start=\"266\" data-end=\"315\"\u003eHX-4S-A20 Rev 1.1 4S 20A BMS Protection Board\u003c\/strong\u003e is a reliable lithium battery management system designed for 4-cell (4S) 18650 Li-ion battery packs. This protection board provides advanced safety features including overcharge protection, over-discharge protection, overcurrent protection, and short-circuit protection to ensure safe and stable battery operation.\u003c\/p\u003e\n\u003cp data-start=\"632\" data-end=\"942\"\u003eDesigned for 14.8V nominal and 16.8V fully charged lithium battery packs, this BMS module supports up to 20A continuous current, making it suitable for DIY battery packs, portable power systems, robotics, solar projects, LED backup systems, electric vehicles, and other high-power lithium battery applications.\u003c\/p\u003e\n\u003cp data-start=\"944\" data-end=\"1125\"\u003eThe compact design and stable performance make it ideal for makers, engineers, hobbyists, and battery pack builders looking for efficient battery protection and charging management.\u003c\/p\u003e\n\u003ch3 data-section-id=\"19zqy0x\" data-start=\"1127\" data-end=\"1139\"\u003eFeatures\u003c\/h3\u003e\n\u003cul data-start=\"1140\" data-end=\"1436\"\u003e\n\u003cli data-section-id=\"1f0wp1f\" data-start=\"1140\" data-end=\"1185\"\u003eSupports 4S 18650 lithium-ion battery packs\u003c\/li\u003e\n\u003cli data-section-id=\"s1pzps\" data-start=\"1186\" data-end=\"1217\"\u003e20A continuous current output\u003c\/li\u003e\n\u003cli data-section-id=\"1v575rz\" data-start=\"1218\" data-end=\"1241\"\u003eOvercharge protection\u003c\/li\u003e\n\u003cli data-section-id=\"1wtfh70\" data-start=\"1242\" data-end=\"1269\"\u003eOver-discharge protection\u003c\/li\u003e\n\u003cli data-section-id=\"1kxxh57\" data-start=\"1270\" data-end=\"1312\"\u003eOvercurrent and short-circuit protection\u003c\/li\u003e\n\u003cli data-section-id=\"1bpmrm0\" data-start=\"1313\" data-end=\"1358\"\u003eStable charging and discharging performance\u003c\/li\u003e\n\u003cli data-section-id=\"1a7khcp\" data-start=\"1359\" data-end=\"1395\"\u003eCompact and lightweight PCB design\u003c\/li\u003e\n\u003cli data-section-id=\"1in9o84\" data-start=\"1396\" data-end=\"1436\"\u003eSuitable for DIY battery pack projects\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"1yl5694\" data-start=\"1438\" data-end=\"1456\"\u003eSpecifications\u003c\/h3\u003e\n\u003cul data-start=\"1457\" data-end=\"1811\"\u003e\n\u003cli data-section-id=\"1qn05om\" data-start=\"1457\" data-end=\"1483\"\u003eModel: HX-4S-A20 Rev 1.1\u003c\/li\u003e\n\u003cli data-section-id=\"170zn5p\" data-start=\"1484\" data-end=\"1512\"\u003eBattery Type: Li-ion 18650\u003c\/li\u003e\n\u003cli data-section-id=\"1tbyfag\" data-start=\"1513\" data-end=\"1540\"\u003eBattery Configuration: 4S\u003c\/li\u003e\n\u003cli data-section-id=\"1xg9trn\" data-start=\"1541\" data-end=\"1565\"\u003eNominal Voltage: 14.8V\u003c\/li\u003e\n\u003cli data-section-id=\"1o7naxq\" data-start=\"1566\" data-end=\"1594\"\u003eFull Charge Voltage: 16.8V\u003c\/li\u003e\n\u003cli data-section-id=\"15jadv4\" data-start=\"1595\" data-end=\"1617\"\u003eMaximum Current: 20A\u003c\/li\u003e\n\u003cli data-section-id=\"9mql1z\" data-start=\"1618\" data-end=\"1662\"\u003eOvercharge Detection Voltage: 3.90V ±0.25V\u003c\/li\u003e\n\u003cli data-section-id=\"10q3ueq\" data-start=\"1663\" data-end=\"1705\"\u003eOvercharge Release Voltage: 3.80V ±0.05V\u003c\/li\u003e\n\u003cli data-section-id=\"8cckb7\" data-start=\"1706\" data-end=\"1753\"\u003eOver-discharge Detection Voltage: 2.0V ±0.08V\u003c\/li\u003e\n\u003cli data-section-id=\"lwvudi\" data-start=\"1754\" data-end=\"1777\"\u003eLow Power Consumption\u003c\/li\u003e\n\u003cli data-section-id=\"1xuyu0h\" data-start=\"1778\" data-end=\"1811\"\u003ePCB Protection Circuit Included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-section-id=\"wggvqn\" data-start=\"1813\" data-end=\"1829\"\u003eApplications\u003c\/h3\u003e\n\u003cul data-start=\"1830\" data-end=\"2070\"\u003e\n\u003cli data-section-id=\"irli9f\" data-start=\"1830\" data-end=\"1857\"\u003eDIY lithium battery packs\u003c\/li\u003e\n\u003cli data-section-id=\"lh4sl6\" data-start=\"1858\" data-end=\"1892\"\u003e18650 battery management systems\u003c\/li\u003e\n\u003cli data-section-id=\"1qyqz01\" data-start=\"1893\" data-end=\"1915\"\u003ePortable power banks\u003c\/li\u003e\n\u003cli data-section-id=\"v7x5yg\" data-start=\"1916\" data-end=\"1948\"\u003eElectric bicycles and scooters\u003c\/li\u003e\n\u003cli data-section-id=\"hyas1o\" data-start=\"1949\" data-end=\"1973\"\u003eRobotics power systems\u003c\/li\u003e\n\u003cli data-section-id=\"1p80lp2\" data-start=\"1974\" data-end=\"2005\"\u003eSolar energy storage projects\u003c\/li\u003e\n\u003cli data-section-id=\"16fjdec\" data-start=\"2006\" data-end=\"2036\"\u003eLED emergency backup systems\u003c\/li\u003e\n\u003cli data-section-id=\"1i0ojbk\" data-start=\"2037\" data-end=\"2070\"\u003eUPS battery protection circuits\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"MAJESTRONICZ","offers":[{"title":"Default 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