{"product_id":"10pcs-18650-li-ion-battery-protection-board-3-7v-28x3mm","title":"10Pcs 18650 Li-Ion Battery Protection Board 3.7V 28×3mm","description":"\n\u003ch2\u003e10-Pack 18650 Li-Ion Battery Protection Boards – 3.7V, 28×3mm\u003c\/h2\u003e\n\u003cp\u003eKeep your 3.7V 18650 lithium-ion batteries safe and performing at their best with this set of 10 precision protection circuit boards. Each board is engineered with a high-quality integrated circuit to guard against overcharging, over-discharging, short circuits, and overcurrent — giving you peace of mind whether you're building DIY electronics, battery packs, or repair projects.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003e4-in-1 Protection:\u003c\/strong\u003e Overcharge, over-discharge, short circuit, and overcurrent protection in a single compact board.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePrecision IC:\u003c\/strong\u003e Main IC uses imported precision components for stable, reliable performance.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eLow Current Consumption:\u003c\/strong\u003e Minimal standby draw ensures your battery retains its charge when not in use.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompact Design:\u003c\/strong\u003e Ultra-slim 28×3mm profile fits neatly inside 18650 battery housings.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSolderable Tabs:\u003c\/strong\u003e Pre-fitted solder tabs make installation straightforward for DIY enthusiasts and technicians alike.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDurable Build:\u003c\/strong\u003e Fine workmanship ensures consistent performance and long service life.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVersatile Compatibility:\u003c\/strong\u003e Suitable for a wide range of 3.7V lithium-ion battery configurations and high-integration, low-cost applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e28 × 3mm (approx.)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eCompatible Battery\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e3.7V 18650 Li-Ion\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOvercharge Release Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e4.275 ± 0.025V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOvercharging Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e4.075 ± 0.025V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOver-Discharge Voltage Range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e2.5 ± 0.1V\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eOvercurrent Detection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e2.8 ± 0.3A\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr style=\"background:#f5f5f5;\"\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003eCarbide PCB\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e\u003cstrong\u003ePackage Quantity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding:8px; border:1px solid #ddd;\"\u003e10 × Protection Boards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eConnection Guide\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eB+\u003c\/strong\u003e → Connect to Battery Positive (+)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eB−\u003c\/strong\u003e → Connect to Battery Negative (−)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eP+\u003c\/strong\u003e → Battery Output \/ Input Positive (+)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eP−\u003c\/strong\u003e → Battery Output \/ Input Negative (−)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e10 × 18650 Li-Ion Battery Protection Boards\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eMade in Mainland China.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Like\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1-channel-relay-module-dc-3-3v-24v-optocoupler-arduino\"\u003e1-Channel Relay Module DC 3.3V–24V Optocoupler for Arduino\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/0-25mm-1000-turn-precision-copper-inductor-coil-diy-electronics\"\u003e0.25mm 1000-Turn Precision Copper Inductor Coil for DIY Circuits\u003c\/a\u003e\u003c\/li\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\u003c\/ul\u003e\n\n\u003cp\u003eFor more information on lithium battery safety standards, visit the U.S. Consumer Product Safety Commission (CPSC) – Lithium Battery Safety.\u003c\/p\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eActual color may vary slightly from images due to monitor brightness and lighting conditions.\u003c\/li\u003e\n  \u003cli\u003ePlease allow a slight manual measurement deviation of ±1–2mm.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/en.wikipedia.org\/wiki\/Battery_management_system\" target=\"_blank\" rel=\"noopener\"\u003eBattery management system\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Are these 18650 battery protection boards compatible with all 3.7V lithium-ion batteries?\u003c\/h4\u003e\n\u003cp\u003eA: These protection boards are designed primarily for 3.7V 18650 Li-Ion cells. They are also compatible with many other similarly rated lithium-ion battery types and configurations, making them a versatile choice for a wide range of DIY and repair projects.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What protections do these boards provide for my 18650 battery?\u003c\/h4\u003e\n\u003cp\u003eA: Each board offers four key protections: overcharge protection (cuts off at 4.275V), over-discharge protection (cuts off at 2.5V), overcurrent protection (triggers at approximately 2.8A), and short circuit protection — all essential for maximizing battery safety and longevity.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Do I need to solder these protection boards onto my battery?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. These boards come with solder tabs for secure connection to your 18650 cell. Standard soldering equipment and basic electronics knowledge are recommended for proper installation. Connect B+ to battery positive, B− to battery negative, P+ to output positive, and P− to output negative.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Why do I get 10 pieces in one order?\u003c\/h4\u003e\n\u003cp\u003eA: This listing includes 10 protection boards per pack, offering excellent value for hobbyists, electronics repair professionals, and makers who need multiple boards for battery pack builds or spare replacements.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Are these 18650 battery protection boards compatible with all 3.7V lithium-ion batteries?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"These protection boards are designed primarily for 3.7V 18650 Li-Ion cells. 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Connect B+ to battery positive, B− to battery negative, P+ to output positive, and P− to output negative.\"}}, {\"@type\": \"Question\", \"name\": \"Why do I get 10 pieces in one order?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This listing includes 10 protection boards per pack, offering excellent value for hobbyists, electronics repair professionals, and makers who need multiple boards for battery pack builds or spare replacements.\"}}]}\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\": \"10Pcs 18650 Li-Ion Battery Protection Board 3.7V 28×3mm\", \"item\": \"https:\/\/oasis-select.com\/products\/10pcs-18650-li-ion-battery-protection-board-3-7v-28x3mm\"}]}\u003c\/script\u003e","brand":"Oasis Select","offers":[{"title":"Default Title","offer_id":47748412113001,"sku":"\u003cnone\u003e","price":7.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0679\/7931\/3257\/files\/S2851a5e14b394e6190e3bd634307ace3B.webp?v=1783083723","url":"https:\/\/oasis-select.com\/products\/10pcs-18650-li-ion-battery-protection-board-3-7v-28x3mm","provider":"Oasis Select","version":"1.0","type":"link"}