{"product_id":"30-cell-18650-battery-shell-pcb-protection-circuit-board-set-1","title":"30-Cell 18650 Battery Shell \u0026 PCB Protection Circuit Board Set","description":"\n\u003ch2\u003e30-Cell 18650 Li-Ion Battery Housing \u0026amp; PCB Protection Circuit Board Set\u003c\/h2\u003e\n\u003cp\u003eThis 1-set kit contains a \u003cstrong\u003e30-cell 18650 lithium battery shell\u003c\/strong\u003e combined with a \u003cstrong\u003ePCB charging protection circuit board\u003c\/strong\u003e, designed for experienced technicians who repair, rebuild, or assemble custom battery packs compatible with Mak-style power tool chargers. \u003cem\u003eNote: Battery cells and charger are NOT included — this is a component assembly set only.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Protection Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigh-temperature \u0026amp; low-temperature protection\u003c\/strong\u003e — safeguards charging and discharging cycles across temperature extremes\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eExternally adjustable temperature control\u003c\/strong\u003e — fine-tune parameters without opening the board\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOvercharge detection protection\u003c\/strong\u003e — prevents cells from being charged beyond safe voltage limits\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eOver-discharge detection protection\u003c\/strong\u003e — cuts off output before cells drop to damaging voltage levels\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eThree-stage overcurrent protection\u003c\/strong\u003e — staged response for light, moderate, and severe overcurrent events\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAdjustable overcurrent delay\u003c\/strong\u003e — first and second-stage delays are externally configurable\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBattery disconnection protection\u003c\/strong\u003e — alerts and disconnects when a cell is improperly connected\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNTC resistor disconnection protection\u003c\/strong\u003e — board shuts down if the temperature sensor is disconnected\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShort-circuit protection\u003c\/strong\u003e — immediate shutdown on short-circuit detection\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCell Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e30 × 18650 Li-Ion cells (cells not included)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePlastic + Metal\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e14.8 × 7.3 × 11 cm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMak-style chargers\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePackage Includes\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1 Set (shell + PCB 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\u003eAssembly \u0026amp; Usage Precautions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThis product is intended for individuals with hands-on experience in battery assembly and a thorough understanding of Li-Ion cell performance.\u003c\/strong\u003e Please follow all precautions below:\u003c\/p\u003e\n\u003col\u003e\n  \u003cli\u003eDouble-check polarity when welding battery leads and sampling points — reversed connections may damage the circuit board.\u003c\/li\u003e\n  \u003cli\u003eThe BMS (Battery Management System) board must NOT directly contact bare cell surfaces; ensure firm and reliable mechanical assembly.\u003c\/li\u003e\n  \u003cli\u003eAll soldering equipment must be properly grounded; observe strict anti-static precautions to avoid damaging the protection board.\u003c\/li\u003e\n  \u003cli\u003eKeep lead wires, soldering irons, and other conductive tools away from PCB components during assembly.\u003c\/li\u003e\n  \u003cli\u003eProtect the board from static electricity, moisture, and water at all times during use and storage.\u003c\/li\u003e\n  \u003cli\u003eIf there is no voltage output on first power-on after assembly, activate the pack using a dedicated compatible charger. Contact us if abnormalities persist.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eExplore More Related Products\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/electromagnetic-induction-tester-coil-motherboard-fault-detector\"\u003eElectromagnetic Induction Tester – Coil \u0026amp; Circuit Fault Detector\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/air-compressor-pressure-gauge-0-10-0-12-0-25-bar-hydraulic-diy\"\u003eAir Compressor Pressure Gauge 0-10\/0-12\/0-25 Bar | DIY Tool\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/360-bicycle-chain-cleaner-tool-gear-cleaning-kit\"\u003e360° Bicycle Chain Cleaner Tool | Bike Gear Cleaning Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.energystar.gov\/products\" target=\"_blank\" rel=\"noopener\"\u003eENERGY STAR product efficiency guidance\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: Does this 30-cell 18650 battery shell kit include batteries or a charger?\u003c\/h4\u003e\n\u003cp\u003eA: No — this set includes only the plastic\/metal battery housing shell and the PCB charging protection circuit board. You will need to source your own 18650 Li-Ion cells and a compatible Mak-style charger separately.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Who is this 18650 battery PCB protection board designed for?\u003c\/h4\u003e\n\u003cp\u003eA: This kit is intended for experienced battery technicians, electronics hobbyists, and DIY builders who are familiar with Li-Ion cell performance and have hands-on experience in battery pack assembly and welding. It is not recommended for beginners.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What types of protection does the PCB circuit board provide?\u003c\/h4\u003e\n\u003cp\u003eA: The board includes overcharge protection, over-discharge protection, three-stage overcurrent protection, short-circuit protection, high\/low temperature protection, battery disconnection protection, and NTC resistor disconnection protection — making it a comprehensive battery management solution for 30S Li-Ion packs.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What are the dimensions of the battery shell housing?\u003c\/h4\u003e\n\u003cp\u003eA: The housing measures approximately 14.8 × 7.3 × 11 cm. Please note that slight variations may occur due to manual measurement. The color is black with a plastic and metal construction.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Does this 30-cell 18650 battery shell kit include batteries or a charger?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No — this set includes only the plastic\/metal battery housing shell and the PCB charging protection circuit board. You will need to source your own 18650 Li-Ion cells and a compatible Mak-style charger separately.\"}}, {\"@type\": \"Question\", \"name\": \"Who is this 18650 battery PCB protection board designed for?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This kit is intended for experienced battery technicians, electronics hobbyists, and DIY builders who are familiar with Li-Ion cell performance and have hands-on experience in battery pack assembly and welding. 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