{"product_id":"21v-18650-battery-protection-board-for-makita-6mos-30a-5mos-25a","title":"21V 18650 Battery Protection Board for Makita – 6MOS 30A\/5MOS 25A","description":"\n\u003ch2\u003eMakita 18650 Battery Protection Circuit Board – 21V Replacement\u003c\/h2\u003e\n\u003cp\u003eKeep your Makita 18650 lithium battery packs running safely and reliably with this high-quality \u003cstrong\u003e21V Battery Protection Board\u003c\/strong\u003e. Available in two configurations — \u003cstrong\u003e6MOS 30A\u003c\/strong\u003e and \u003cstrong\u003e5MOS 25A\u003c\/strong\u003e — this replacement BMS (Battery Management System) circuit board features a 5-string cell layout, alloy copper hardware, and built-in temperature control for comprehensive battery protection.\u003c\/p\u003e\n\n\u003cp\u003eWhether you're rebuilding a worn-out Makita power tool battery or upgrading an existing pack, this CE-certified board delivers over-charge, over-discharge, over-current, and short-circuit protection to extend the life of your battery cells and protect your tools.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible with Makita 18650 battery packs\u003c\/strong\u003e — ideal replacement for DIY battery rebuilds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTwo configurations available:\u003c\/strong\u003e 6MOS 30A (higher current) or 5MOS 25A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003e5-string (5S) large board design\u003c\/strong\u003e — supports 21V nominal lithium-ion packs\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTemperature control protection\u003c\/strong\u003e — prevents thermal runaway and overheating\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAlloy copper hardware\u003c\/strong\u003e — for low resistance and reliable high-current performance\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCE Certified\u003c\/strong\u003e — meets European safety and electromagnetic compatibility standards\u003c\/li\u003e\n  \u003cli\u003eProtects against: \u003cem\u003eovercharge, over-discharge, overcurrent, and short circuit\u003c\/em\u003e\n\u003c\/li\u003e\n  \u003cli\u003eLow voltage range: below 75V DC \/ below 50V AC\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e21V (5S Li-ion)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConfigurations\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6MOS 30A \/ 5MOS 25A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCell Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18650 Lithium-Ion\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCertification\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eCE\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTemperature Control\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCharger Included\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Contents\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 × Protection Board\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOrigin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMainland China\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eWhat's in the Box?\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × 21V 18650 Battery Protection Circuit Board (your choice of 6MOS 30A or 5MOS 25A)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-scr-solid-state-relay-switch-module-dc3-24v-40a-optocoupler\"\u003e1-Channel SCR Solid State Relay Module DC3-24V 40A Optocoupler\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-60mpa-pressure-gauge-s60h-diesel-injector-nozzle-tester-8000psi\"\u003e0-60MPa Pressure Gauge for S60H Diesel Injector Nozzle Tester\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor general guidance on lithium battery safety standards and best practices, refer to the U.S. Consumer Product Safety Commission – Lithium-Ion Battery Safety.\u003c\/p\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Printed_circuit_board\" target=\"_blank\" rel=\"noopener\"\u003ePrinted circuit board\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch4\u003eQ: Which Makita battery packs is this 21V protection board compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This 21V 5-string (5S) lithium-ion battery protection board is designed to be compatible with Makita 18650 cell battery packs that operate at a 21V nominal voltage. It is commonly used in DIY battery rebuilds for Makita 18V\/21V power tool batteries. Always verify the cell count and layout of your specific pack before installation.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What is the difference between the 6MOS 30A and 5MOS 25A versions?\u003c\/h4\u003e\n\u003cp\u003eA: The \u003cstrong\u003e6MOS 30A\u003c\/strong\u003e version uses six MOSFET switches and supports a higher continuous discharge current of 30A, making it better suited for high-drain power tools. The \u003cstrong\u003e5MOS 25A\u003c\/strong\u003e version uses five MOSFETs and handles up to 25A, suitable for moderate-demand applications. Choose based on the peak current requirements of your power tool.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Does this protection board include over-temperature protection?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. This board features built-in temperature control, which monitors the battery's thermal state and cuts off the circuit if temperatures exceed safe limits — helping prevent thermal runaway, battery damage, and potential safety hazards.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is any soldering required for installation?\u003c\/h4\u003e\n\u003cp\u003eA: Yes, installing a battery protection board typically requires soldering skills and the appropriate tools. It is recommended for users with experience in electronics repair or battery rebuilding. If you are unsure, consult a qualified technician.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Which Makita battery packs is this 21V protection board compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This 21V 5-string (5S) lithium-ion battery protection board is designed to be compatible with Makita 18650 cell battery packs that operate at a 21V nominal voltage. It is commonly used in DIY battery rebuilds for Makita 18V\/21V power tool batteries. Always verify the cell count and layout of your specific pack before installation.\"}}, {\"@type\": \"Question\", \"name\": \"What is the difference between the 6MOS 30A and 5MOS 25A versions?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"The 6MOS 30A version uses six MOSFET switches and supports a higher continuous discharge current of 30A, making it better suited for high-drain power tools. The 5MOS 25A version uses five MOSFETs and handles up to 25A, suitable for moderate-demand applications. Choose based on the peak current requirements of your power tool.\"}}, {\"@type\": \"Question\", \"name\": \"Does this protection board include over-temperature protection?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes. This board features built-in temperature control, which monitors the battery's thermal state and cuts off the circuit if temperatures exceed safe limits — helping prevent thermal runaway, battery damage, and potential safety hazards.\"}}, {\"@type\": \"Question\", \"name\": \"Is any soldering required for installation?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Yes, installing a battery protection board typically requires soldering skills and the appropriate tools. It is recommended for users with experience in electronics repair or battery rebuilding. If you are unsure, consult a qualified technician.\"}}]}\u003c\/script\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"BreadcrumbList\", \"itemListElement\": [{\"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/oasis-select.com\/\"}, {\"@type\": \"ListItem\", \"position\": 2, \"name\": \"Electronics \u0026 Tech\", \"item\": \"https:\/\/oasis-select.com\/collections\/electronics-tech\"}, {\"@type\": \"ListItem\", \"position\": 3, \"name\": \"21V 18650 Battery Protection Board for Makita – 6MOS 30A\/5MOS 25A\", \"item\": \"https:\/\/oasis-select.com\/products\/21v-18650-battery-protection-board-makita-6mos-30a-5mos-25a\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"5MOS 25A","offer_id":53755314929977,"sku":"14:365458#5MOS 25A","price":14.24,"currency_code":"USD","in_stock":true},{"title":"6MOS 30A","offer_id":53755314962745,"sku":"14:200004890#6MOS 30A","price":14.15,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/3689\/5801\/files\/S879a663299ad4adea620accb93cf2522G.webp?v=1783697406","url":"https:\/\/peacefulpleasureswellness.com\/products\/21v-18650-battery-protection-board-for-makita-6mos-30a-5mos-25a","provider":"Peaceful Pleasures Health and Wellness","version":"1.0","type":"link"}