{"product_id":"3s-10a-bms-lithium-ion-battery-protection-board-with-cell-balancing-11-1v-12-6v","title":"3S 10A BMS Lithium-Ion Battery Protection Board with Cell Balancing (11.1V \/ 12.6V)","description":"\u003cp data-path-to-node=\"5\"\u003eThe \u003cb data-path-to-node=\"5\" data-index-in-node=\"4\"\u003e3S 10A BMS (Battery Management System)\u003c\/b\u003e is the standard foundation for anyone looking to build a custom 11.1V lithium-ion battery pack. Designed to manage three lithium cells (18650, 21700, or LiPo) wired in series, this board delivers the perfect balance of moderate current handling and comprehensive safety. Operating at a peak fully-charged voltage of 12.6V, it is the absolute go-to module for replacing heavy lead-acid batteries or powering modern 12V electronics, sensors, and networking gear.\u003c\/p\u003e\n\u003cp data-path-to-node=\"6\"\u003eWhat elevates this specific module above ultra-basic protection boards is its integrated \u003cb data-path-to-node=\"6\" data-index-in-node=\"89\"\u003ecell balancing\u003c\/b\u003e feature. Over dozens of charge cycles, individual cells in a series pack will naturally drift in voltage. The onboard balancing circuitry monitors each of the three tiers independently. When one cell hits the 4.2V maximum before the others, the board gently bleeds off that excess voltage through surface-mount resistors, allowing the remaining cells to catch up. This guarantees your entire pack reaches true 100% capacity safely, extending its usable lifespan significantly.\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e\u003cb data-path-to-node=\"7\" data-index-in-node=\"0\"\u003eKey Features \u0026amp; Functional Advantages:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"8\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,0,0\"\u003e\u003cb data-path-to-node=\"8,0,0\" data-index-in-node=\"0\"\u003e10A Continuous Discharge:\u003c\/b\u003e Capable of safely delivering a steady 10 Amps of current (roughly 120 Watts of continuous power), making it ideal for moderate-drain electronics and lighting without overheating.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,1,0\"\u003e\u003cb data-path-to-node=\"8,1,0\" data-index-in-node=\"0\"\u003eIntegrated Cell Balancing:\u003c\/b\u003e Automatically equalizes the voltage across all three cells during the final trickle-charge phase, preventing premature pack degradation and capturing maximum runtime.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,2,0\"\u003e\u003cb data-path-to-node=\"8,2,0\" data-index-in-node=\"0\"\u003e4-Tier Safety Suite:\u003c\/b\u003e Features instant automatic hardware cut-offs for over-charge voltage, deep over-discharge voltage (preventing permanent chemistry death), over-current faults, and hard short-circuits.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,3,0\"\u003e\u003cb data-path-to-node=\"8,3,0\" data-index-in-node=\"0\"\u003eCompact Integration:\u003c\/b\u003e Designed with a slim, flat footprint that easily slips alongside a triangle or flat-pack 18650 cell configuration without wasting valuable enclosure space.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"8,4,0\"\u003e\u003cb data-path-to-node=\"8,4,0\" data-index-in-node=\"0\"\u003eCommon Port \/ Split Port Wiring:\u003c\/b\u003e Depending on the specific manufacturer revision, it easily wires into your project to safely regulate both incoming charge voltage and outgoing load current.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"9\"\u003e\u003cb data-path-to-node=\"9\" data-index-in-node=\"0\"\u003ePerfect For:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"10\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,0,0\"\u003e\u003cb data-path-to-node=\"10,0,0\" data-index-in-node=\"0\"\u003eDIY 12V UPS Systems:\u003c\/b\u003e The ideal power management brain for building custom backup batteries to keep Wi-Fi routers, homelab network switches, and security cameras online during power outages.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,1,0\"\u003e\u003cb data-path-to-node=\"10,1,0\" data-index-in-node=\"0\"\u003eCustom LED Lighting:\u003c\/b\u003e Safely regulates power for portable 12V LED floodlights, camping lanterns, and RGB strip lighting arrays.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,2,0\"\u003e\u003cb data-path-to-node=\"10,2,0\" data-index-in-node=\"0\"\u003ePortable Audio Speakers:\u003c\/b\u003e Provides safe, balanced power to 12V Bluetooth amplifier boards in custom-built boomboxes and desktop speakers.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"10,3,0\"\u003e\u003cb data-path-to-node=\"10,3,0\" data-index-in-node=\"0\"\u003eSolar IoT \u0026amp; Telemetry:\u003c\/b\u003e An excellent main power controller for 12V off-grid telemetry nodes, environmental sensors, and remote weather stations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"11\"\u003e\u003cb data-path-to-node=\"11\" data-index-in-node=\"0\"\u003eTechnical Specifications:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"12\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,0,0\"\u003e\u003cb data-path-to-node=\"12,0,0\" data-index-in-node=\"0\"\u003eConfiguration:\u003c\/b\u003e 3S (3 Cells in Series)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,1,0\"\u003e\u003cb data-path-to-node=\"12,1,0\" data-index-in-node=\"0\"\u003eSupported Chemistry:\u003c\/b\u003e Lithium-Ion (18650, 21700, etc.) with 3.7V nominal \/ 4.2V peak rating\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,2,0\"\u003e\u003cb data-path-to-node=\"12,2,0\" data-index-in-node=\"0\"\u003eNominal Voltage:\u003c\/b\u003e 11.1V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,3,0\"\u003e\u003cb data-path-to-node=\"12,3,0\" data-index-in-node=\"0\"\u003eFull Charge Voltage:\u003c\/b\u003e 12.6V (Requires a dedicated 12.6V CC\/CV lithium charger)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,4,0\"\u003e\u003cb data-path-to-node=\"12,4,0\" data-index-in-node=\"0\"\u003eMaximum Continuous Current:\u003c\/b\u003e 10A\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,5,0\"\u003e\u003cb data-path-to-node=\"12,5,0\" data-index-in-node=\"0\"\u003ePeak \/ Transient Current:\u003c\/b\u003e ~20A (Brief spikes)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,6,0\"\u003e\u003cb data-path-to-node=\"12,6,0\" data-index-in-node=\"0\"\u003eOvercharge Protection Threshold:\u003c\/b\u003e 4.25V ±0.05V per cell\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,7,0\"\u003e\u003cb data-path-to-node=\"12,7,0\" data-index-in-node=\"0\"\u003eOver-Discharge Cut-off Threshold:\u003c\/b\u003e 2.5V ±0.05V per cell\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,8,0\"\u003e\u003cb data-path-to-node=\"12,8,0\" data-index-in-node=\"0\"\u003eBalancing Current:\u003c\/b\u003e ~42mA to 60mA per cell\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"12,9,0\"\u003e\u003cb data-path-to-node=\"12,9,0\" data-index-in-node=\"0\"\u003eApproximate Dimensions:\u003c\/b\u003e 53 mm x 17 mm x 4 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K-TECHNICS","offers":[{"title":"Default Title","offer_id":42857802694727,"sku":null,"price":500.0,"currency_code":"KES","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0680\/7637\/2039\/files\/3S-BMS.webp?v=1780907467","url":"https:\/\/www.ktechnics.com\/products\/3s-10a-bms-lithium-ion-battery-protection-board-with-cell-balancing-11-1v-12-6v","provider":"K-TECHNICS","version":"1.0","type":"link"}