{"product_id":"1s-4a-bms-protection-board-for-3-7v-li-ion-battery-259-fdc-3540","title":"1S 4A BMS Protection Board for 3.7V Li-ion Battery – 259-FDC-3540","description":"\u003ch1\u003e\u003cspan\u003e1S 4A BMS Protection Board for 3.7V Li-ion Battery – 259-FDC-3540\u003c\/span\u003e\u003c\/h1\u003e\n\u003ch2\u003e\u003cspan\u003eProduct Description\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003e\u003cspan\u003eProtect compatible single-cell lithium-ion battery packs with the \u003c\/span\u003e\u003cstrong\u003e\u003cspan\u003e259-FDC-3540 1S 4A BMS Protection Board\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e. This compact battery protection module is designed for suitable 3.6V\/3.7V nominal lithium-ion and lithium-polymer battery applications, including compatible 18650 cells and small rechargeable battery projects.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe board provides advertised protection against overcharging, excessive discharge, overcurrent and short circuits. It helps disconnect the protected battery circuit when specified electrical fault conditions are detected, supporting safer operation when correctly installed with a suitable cell, charger and load.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eIts slim PCB format is useful for space-conscious battery-pack assemblies, portable electronics, DIY electronics and compatible low-voltage projects.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSingle-Cell Protection:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Designed for compatible 1S lithium-ion and lithium-polymer battery packs.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAdvertised 4A Working Current:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Suitable for applications within the board's verified current and thermal limits.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOvercharge Protection:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Helps interrupt charging when the configured overcharge threshold is reached.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOver-Discharge Protection:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Helps prevent continued discharge below the board's protection threshold.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOvercurrent and Short-Circuit Protection:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Advertised fault-protection functions help disconnect the protected circuit under specified abnormal conditions.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCompact PCB Design:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approximately 35mm long, suitable for compact battery-pack integration.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eProtected Battery Connections:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Uses battery and output terminals identified as B+, B−, P+ and P− in the seller's wiring information.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eModel: 259-FDC-3540\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eConfiguration: 1S, single-cell battery protection\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCompatible battery chemistry: Lithium-ion \/ lithium-polymer, subject to cell specifications\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eNominal battery voltage: 3.6V\/3.7V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAdvertised charging voltage: 4.2V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAdvertised working current: 4A\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAdvertised peak \/ overcurrent figure: 5A; operating conditions and duration require supplier confirmation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAdvertised overcharge threshold: 4.25V ± 0.05V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAdvertised over-discharge threshold: approximately 2.45V–2.5V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAdvertised protection: Overcharge, over-discharge, overcurrent and short circuit\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eApproximate dimensions: 35 × 4mm; thickness reported as approximately 2–2.2mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eConnections: B+, B−, P+, P−, according to the board's wiring configuration\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003ePackage contents: 1 × 1S battery protection board\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e\u003cspan\u003eSpecifications are based on available retailer listings. Confirm exact thresholds, continuous current, dimensions, and chip marking for the supplied batch.\u003c\/span\u003e\u003c\/em\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eApplications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCompatible 18650 single-cell battery packs\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSuitable single-cell lithium-polymer battery assemblies\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003ePortable electronic devices\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDIY battery-powered projects\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eSmall low-voltage electronics within the board's electrical limits\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0965\/3623\/2249\/files\/10_Typical_Applications_08b855f2-27e1-40a9-8833-b7e05c6abf37.png?v=1793117644\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eInstallation and Safety Notes\u003c\/span\u003e\u003c\/h3\u003e\n\u003col start=\"1\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eConfirm that the battery is a compatible single-cell lithium-ion or lithium-polymer type.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIdentify the B+, B−, P+ and P− pads from the supplied board's markings or verified wiring diagram before soldering.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eIncorrect polarity or wiring can damage the protection board and battery.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eUse a suitable lithium-ion charger with the correct charging profile; this board is not a standalone charger.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eEnsure the cell, wiring, load and board are all suitable for the required current.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eDo not use this 1S board for series-connected multi-cell battery packs.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eInsulate exposed connections and avoid short circuits during installation.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cspan\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0965\/3623\/2249\/files\/08_Installation_Caution_51c563a6-9b98-4ffe-8664-332020d818e0.png?v=1793117592\" alt=\"\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePackage Includes:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 1 × 259-FDC-3540 1S 4A lithium battery protection board.\u003c\/span\u003e\u003c\/p\u003e","brand":"Electronics Hub","offers":[{"title":"Default Title","offer_id":67852550603065,"sku":null,"price":58.0,"currency_code":"PKR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0965\/3623\/2249\/files\/01_Main_Product_Image_No_Top_Heading.png?v=1793117530","url":"https:\/\/electronicshub.pk\/products\/1s-4a-bms-protection-board-for-3-7v-li-ion-battery-259-fdc-3540","provider":"Electronics Hub","version":"1.0","type":"link"}