{"product_id":"2s-7-4v-20a-li-ion-bms-protection-board-18650-balanced-10a-charge-45x15mm","title":"2S 7.4V 20A Li-ion BMS Protection Board — 18650, Balanced, 10A Charge, 45×15mm","description":"\u003ch2\u003e2S 7.4V 20A Li-ion BMS Protection Board — 18650, Balanced, 10A Charge\u003c\/h2\u003e\n\n\u003cp\u003eThis \u003cstrong\u003e2S BMS (Battery Management System)\u003c\/strong\u003e protects a 2-cell series lithium-ion battery pack (7.4V nominal, 8.4V fully charged) from overcharge, overdischarge, and overcurrent — with cell balancing to equalize charge between the two cells. Designed for 18650, 26650, and polymer Li-ion cells. The 20A continuous discharge and 10A charge rating suits power tools, e-bikes, and high-drain portable devices. Available in standard (45×15mm) and balancing (48×20mm) versions.\u003c\/p\u003e\n\n\u003ch3\u003eProtection Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eConfiguration:\u003c\/strong\u003e 2S (2 cells in series)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNominal Voltage:\u003c\/strong\u003e 7.4V (2 × 3.7V)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull Charge Voltage:\u003c\/strong\u003e 8.4V (2 × 4.2V)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCharging Voltage:\u003c\/strong\u003e 8.4V – 9.0V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContinuous Discharge Current:\u003c\/strong\u003e 20A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eContinuous Charge Current:\u003c\/strong\u003e 10A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCell Balancing:\u003c\/strong\u003e Yes (passive balancing)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible Cells:\u003c\/strong\u003e 18650, 26650, polymer Li-ion (3.7V nominal \/ 4.2V full)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions (Standard):\u003c\/strong\u003e 45 × 15 × 3.4mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDimensions (Balancing):\u003c\/strong\u003e 48 × 20 × 3.4mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003e2S BMS Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e2S 18650 pack = 7.4V — common for RC cars, drones, and power tools\u003c\/li\u003e\n  \u003cli\u003eBalancing version recommended for long-term cycling to prevent cell imbalance\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eTypical Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY 7.4V power tool battery pack\u003c\/li\u003e\n  \u003cli\u003e2S LiPo RC car and drone battery protection\u003c\/li\u003e\n  \u003cli\u003ePortable 7.4V power bank\u003c\/li\u003e\n  \u003cli\u003eE-bike 7.4V auxiliary battery\u003c\/li\u003e\n  \u003cli\u003eHigh-drain 2S Li-ion pack protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e2S 7.4V 20A BMS protection board — 18650, balanced, 20A discharge, 10A charge, overcharge\/overdischarge\/overcurrent for DIY power tool and drone battery packs.\u003c\/p\u003e","brand":"Keszoox","offers":[{"title":"equilibrium","offer_id":46991440576747,"sku":"14:1202#equilibrium","price":6.48,"currency_code":"USD","in_stock":true},{"title":"standard","offer_id":46991440609515,"sku":"14:4044226#standard","price":6.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/2s-7-4v-8-4v-li-ion-bms-balanced-20a-18650.webp?v=1761808378","url":"https:\/\/keszoox.com\/products\/2s-7-4v-20a-li-ion-bms-protection-board-18650-balanced-10a-charge-45x15mm","provider":"Keszoox","version":"1.0","type":"link"}