{"product_id":"3s-bms","title":"3S BMS","description":"\u003cp\u003e\u003cstrong\u003e3S 20A Li-ion Lithium Battery Protection Board (BMS) – 11.1V \/ 12V \/ 12.6V\u003c\/strong\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eThis 3-series (3S) 12.6V 20A lithium battery protection board is designed to provide reliable charging and discharging protection for lithium battery packs. It features automatic recovery protection and is suitable for lithium-ion and lithium polymer cells with nominal voltages of 3.6V or 3.7V.\u003c\/p\u003e\n\u003chr\u003e\n\u003ch3\u003eCompatibility \u0026amp; Application Scope\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eSuitable for 3-series lithium battery packs\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCompatible with:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e18650 batteries\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e26650 batteries\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eLithium polymer batteries\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNominal cell voltage: 3.6V \/ 3.7V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCharging voltage: 12.6V – 13.0V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eContinuous discharge current (max): 20A\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eReduce load current if heat dissipation conditions are poor\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eContinuous charging current (max): 10A\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eVersions \u0026amp; Use Conditions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003eStandard Edition\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eSuitable for start-up current up to 40A\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFor power drills under 65W\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003ePlus Version\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eSuitable for start-up current up to 60A\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFor power drills under 100W\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003ePhysical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eSize: 59 × 20 × 3.4 mm\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWeight: 4.3 g\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eImportant Usage Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eRequires sufficient battery power for drill start-up:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e3 cells rated 15C–20C, or\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e6 cells rated 10C–15C\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eNot suitable for starting standard low-rate 18650 cells\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWiring must strictly follow the voltage sequence:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e0V \/ 4.2V \/ 8.4V \/ 12.6V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eDo not intentionally short-circuit\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eWhen using brushed motors under load, a non-polarized capacitor must be connected in parallel across the motor terminals:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eVoltage rating above 25V\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eCapacitance: 10µF – 100µF\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eThis prevents reverse voltage spikes and MOS transistor damage\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003eFor 3-cell series packs, ensure all cells have the same voltage before use\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003eCells with faster voltage drop indicate poor performance and should not be mixed\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch3\u003eBattery Matching Recommendation\u003c\/h3\u003e\n\u003cp\u003eDo not mix good batteries with poor-performing batteries. Use three cells with similar capacity and internal resistance. Uneven cell combinations significantly reduce performance and reliability.\u003c\/p\u003e\n\u003chr\u003e\n\u003cp\u003eThis protection board is intended for users with appropriate battery matching and wiring practices to ensure safe and stable operation.\u003c\/p\u003e","brand":"38-3D","offers":[{"title":"Default Title","offer_id":51397333123368,"sku":"3S_BMS","price":7.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0762\/7581\/0600\/files\/3S_BMS_0.jpg?v=1770206749","url":"https:\/\/pl.38-3d.co.uk\/products\/3s-bms","provider":"38-3D","version":"1.0","type":"link"}