{"product_id":"2s-7-4v-18650-bms-protection-board-8a-16a","title":"2S 7.4V 18650 BMS Protection Board — 8A Continuous \/ 16A Peak","description":"\u003ch2\u003e2S 7.4V 18650 Lithium Battery BMS Protection Board — 8A \/ 16A\u003c\/h2\u003e\n\u003cp\u003eThis compact \u003cstrong\u003e2S BMS (Battery Management System) protection board\u003c\/strong\u003e is designed for 2-cell series 18650 lithium-ion battery packs operating at \u003cstrong\u003e7.4V nominal\u003c\/strong\u003e. It provides essential protection against overcharge, overdischarge, overcurrent, and short circuits, making it a critical safety component for DIY power banks, RC vehicles, portable tools, and embedded battery systems.\u003c\/p\u003e\n\n\u003ch2\u003eKey Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eConfiguration\u003c\/td\u003e\n\u003ctd\u003e2S (2 cells in series)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eNominal Voltage\u003c\/td\u003e\n\u003ctd\u003e7.4V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCompatible Cell\u003c\/td\u003e\n\u003ctd\u003e18650 Li-ion (3.7V per cell)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eWorking Current\u003c\/td\u003e\n\u003ctd\u003e8A continuous\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eCurrent Limiting (Peak)\u003c\/td\u003e\n\u003ctd\u003e16A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eOvercharge Protection\u003c\/td\u003e\n\u003ctd\u003e4.25V ± 0.05V per cell\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eOverdischarge Protection\u003c\/td\u003e\n\u003ctd\u003e2.5V ± 0.1V per cell\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eShort Circuit Protection\u003c\/td\u003e\n\u003ctd\u003eYes (auto-recovery)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eCN\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhy Choose This BMS Board?\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFull protection suite\u003c\/strong\u003e — Overcharge, overdischarge, overcurrent (8A continuous \/ 16A peak), and short-circuit protection in a single compact module\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAuto-recovery\u003c\/strong\u003e — Short-circuit protection resets automatically once the fault condition is removed; no manual reset required\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact form factor\u003c\/strong\u003e — Designed to fit standard 18650 2S battery pack enclosures and DIY builds\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCell balancing\u003c\/strong\u003e — Passive balancing during charging ensures both cells reach equal voltage, extending pack lifespan\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eWide application compatibility\u003c\/strong\u003e — Suitable for RC vehicles, power banks, portable lighting, e-bikes, and embedded systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTypical Applications\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eDIY 2S 18650 lithium battery packs for RC cars, drones, and robots\u003c\/li\u003e\n  \u003cli\u003ePortable power banks and USB battery stations\u003c\/li\u003e\n  \u003cli\u003eCordless power tools and handheld devices\u003c\/li\u003e\n  \u003cli\u003eLED lighting systems with rechargeable 7.4V packs\u003c\/li\u003e\n  \u003cli\u003eArduino and Raspberry Pi mobile power supply projects\u003c\/li\u003e\n  \u003cli\u003eE-bike and electric scooter auxiliary battery protection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eCompatible With\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003eSamsung INR18650-25R, LG HG2, Panasonic NCR18650B, Sony VTC5A (and equivalent 18650 cells)\u003c\/li\u003e\n  \u003cli\u003eStandard 2S 18650 battery holders and spot-welded nickel strip packs\u003c\/li\u003e\n  \u003cli\u003eTP4056-based charger modules (via B+ \/ B- pads)\u003c\/li\u003e\n  \u003cli\u003eDC-DC boost converters for 5V\/12V output from 7.4V pack\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003ch3\u003eQ: What is the difference between 8A working current and 16A current limiting?\u003c\/h3\u003e\n\u003cp\u003eThe 8A working current is the maximum sustained discharge current the board can handle continuously without thermal issues. The 16A current limiting is the peak threshold at which the board triggers overcurrent protection and cuts off output. Loads drawing more than 16A instantaneously will trigger the protection circuit.\u003c\/p\u003e\n\n\u003ch3\u003eQ: Can this board be used for charging and discharging simultaneously?\u003c\/h3\u003e\n\u003cp\u003eThis board is a protection-only BMS, not a combined charge\/discharge management board. It protects the cells during both charge and discharge cycles but does not regulate charging current. Use a dedicated charger (e.g., TP4056 or CC\/CV charger set to 8.4V for 2S) in conjunction with this board.\u003c\/p\u003e\n\n\u003ch3\u003eQ: How do I wire this board to my 18650 cells?\u003c\/h3\u003e\n\u003cp\u003eConnect B+ to the positive terminal of cell 1, BM (balance tap) to the junction between cell 1 and cell 2, and B- to the negative terminal of cell 2. The P+ and P- pads connect to your load and charger. Ensure correct polarity before connecting cells.\u003c\/p\u003e\n\n\u003ch2\u003ePackage Contents\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e1× 2S 7.4V 18650 BMS Protection Board (8A \/ 16A)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003e18650 cells, charger, and wiring not included.\u003c\/em\u003e\u003c\/p\u003e","brand":"Keszoox","offers":[{"title":"1PCS","offer_id":46985542861035,"sku":"14:1202#1PCS","price":7.64,"currency_code":"USD","in_stock":true},{"title":"5PCS","offer_id":46985542893803,"sku":"14:350852#5PCS","price":12.32,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0677\/1005\/8731\/files\/2s-7-4v-18650-lithium-battery-protection-board.webp?v=1761200039","url":"https:\/\/keszoox.com\/products\/2s-7-4v-18650-bms-protection-board-8a-16a","provider":"Keszoox","version":"1.0","type":"link"}