{"product_id":"bms-lithium-battery-protection-circuit-board-1s-5s-18650-lipo","title":"BMS Lithium Battery Protection Circuit Board – 1S–5S 18650 LiPo Li-ion PCB Module for 10A–25A Applications","description":"\u003ch2\u003eProtect Your Lithium Pack. BMS Protection for Every Cell Configuration.\u003c\/h2\u003e\u003cp\u003eThese BMS (Battery Management System) protection circuit boards safeguard your 18650, LiPo, and Li-ion battery packs from overcharge, over-discharge, and short circuit damage. Available in 1S through 5S configurations for 4.2V to 21V battery packs at 10A to 25A ratings.\u003c\/p\u003e\u003ch3\u003eKey Benefits\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eOvercharge Protection\u003c\/strong\u003e — Cuts off charging when cells reach maximum voltage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver-Discharge Protection\u003c\/strong\u003e — Prevents cells from dropping below safe minimum voltage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShort Circuit Protection\u003c\/strong\u003e — Instantly disconnects on short circuit detection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1S–5S Configurations\u003c\/strong\u003e — Covers 4.2V (1S) through 21V (5S) battery packs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e10A–25A Current Ratings\u003c\/strong\u003e — Suitable for a wide range of DIY battery and power tool applications\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWhether you're building a custom battery pack, repairing a power tool battery, or designing a DIY energy storage system, these BMS boards provide the essential protection that keeps your lithium cells safe and your build reliable.\u003c\/p\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ: What does BMS stand for?\u003c\/strong\u003e\u003cbr\u003eA: Battery Management System — a circuit that protects lithium cells from overcharge, over-discharge, and short circuits.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What configurations are available?\u003c\/strong\u003e\u003cbr\u003eA: Available in 1S (4.2V\/10A), 2S (8.4V\/10A), 3S (12.6V\/25A), 4S (16.8V\/25A), and 5S (21V\/25A).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Is it compatible with 18650 cells?\u003c\/strong\u003e\u003cbr\u003eA: Yes — designed for 18650, LiPo, and Li-ion cell configurations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: Can it be used for power tool batteries?\u003c\/strong\u003e\u003cbr\u003eA: Yes — suitable for DIY power tool battery packs and replacements.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ: What is the current rating?\u003c\/strong\u003e\u003cbr\u003eA: 10A for 1S\/2S configurations; 25A for 3S\/4S\/5S configurations.\u003c\/p\u003e\u003ch3\u003eSPECIFICATIONS\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eType: BMS Protection Circuit Board\u003c\/li\u003e\n\u003cli\u003eConfigurations: 1S (4.2V), 2S (8.4V), 3S (12.6V), 4S (16.8V), 5S (21V)\u003c\/li\u003e\n\u003cli\u003eCurrent: 10A (1S\/2S), 25A (3S\/4S\/5S)\u003c\/li\u003e\n\u003cli\u003eCompatible: 18650, LiPo, Li-ion\u003c\/li\u003e\n\u003cli\u003eWeight: 0.01 lbs \/ 0.005 kg\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Authority Asset Brand","offers":[{"title":"3S BMS 25A 12.6V","offer_id":49119384404212,"sku":"14:351074#3S BMS 25A 12.6V","price":16.99,"currency_code":"USD","in_stock":true},{"title":"5S BMS 25A 21V","offer_id":49119384436980,"sku":"14:10#5S BMS 25A 21V","price":16.99,"currency_code":"USD","in_stock":true},{"title":"2S BMS 10A 8.4V","offer_id":49119384469748,"sku":"14:350852#2S BMS 10A 8.4V","price":16.99,"currency_code":"USD","in_stock":true},{"title":"1S BMS 10A 4.2V","offer_id":49119384502516,"sku":"14:1202#1S BMS 10A 4.2V","price":16.99,"currency_code":"USD","in_stock":true},{"title":"4S BMS 25A 16.8V","offer_id":49119384535284,"sku":"14:201659813#4S BMS 25A 16.8V","price":16.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0823\/0564\/6836\/files\/S1d4c7b5ad8a84039a6ac2bee2dd19ddb5.webp?v=1786489172","url":"https:\/\/authorityassetbrand.com\/products\/bms-lithium-battery-protection-circuit-board-1s-5s-18650-lipo","provider":"Authority Asset Brand","version":"1.0","type":"link"}