{"product_id":"m18-fuel-milwaukee-battery-18v-4ah-8ah-12ah-battery-m18b6-48-11-1850-xc-m18b5","title":"FMA Milwaukee M18 18V Li-ion Rechargeable Battery 4Ah\/8Ah\/12Ah Replace M18B6 M18B5 48-11-1850 48-11-1880 XC","description":"\u003ch2\u003eFMA Milwaukee M18 18V Li-ion Rechargeable Battery — 4Ah \/ 8Ah \/ 12Ah\u003c\/h2\u003e\n\u003cp\u003eHigh-performance 18V lithium-ion replacement battery pack fully compatible with the Milwaukee M18 FUEL power tool platform. Available in three capacity options — 4Ah, 8Ah, and 12Ah — to suit different runtime requirements. Direct replacement for Milwaukee M18B6, M18B5, 48-11-1850, 48-11-1880 XC, and compatible M18 series batteries. Works with all Milwaukee M18 and M18 FUEL cordless tools that accept the standard M18 battery interface.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0732\/9133\/3821\/files\/fma-milwaukee-m18-18v-li-ion-battery-promotional-poster.png?v=1777281889\" alt=\"FMA Milwaukee M18 18V Li-ion Battery Promotional Poster\"\u003e\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMilwaukee M18 Platform Compatible:\u003c\/strong\u003e Fits all Milwaukee M18 and M18 FUEL cordless tools with standard M18 battery interface\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eThree Capacity Options:\u003c\/strong\u003e 4Ah \/ 8Ah \/ 12Ah — choose based on your runtime and weight requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e18V Li-ion Technology:\u003c\/strong\u003e Stable high-voltage output for consistent tool performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in BMS Protection:\u003c\/strong\u003e Overcharge, over-discharge, over-temperature, and short-circuit protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDirect Replacement:\u003c\/strong\u003e Replaces M18B6, M18B5, 48-11-1850, 48-11-1880 XC and compatible equivalents\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand New:\u003c\/strong\u003e FMA brand, manufactured to strict quality standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eNominal Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e18V (5S Li-ion)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eFull Charge Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e21V (5 × 4.2V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eDischarge Cut-off Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e15V (5 × 3.0V)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eChemistry\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eLithium-ion (Li-ion)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eProtection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eBuilt-in BMS (overcharge \/ over-discharge \/ over-temp \/ short-circuit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eInterface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eMilwaukee M18 standard battery interface\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eFMA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eBrand New\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eAvailable Variants\u003c\/h3\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd;\"\u003eCapacity\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd;\"\u003eEnergy\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd;\"\u003eConfiguration\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd;\"\u003eWeight\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd;\"\u003eSKU\u003c\/th\u003e\n\u003cth style=\"padding: 8px; border: 1px solid #ddd;\"\u003eBest For\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e4Ah\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e72Wh\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e5S1P\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e∼610g\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eFL4000-21C5S1PB\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eLightweight, everyday tasks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e8Ah\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e144Wh\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e5S2P\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e∼1010g\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eFL8000-21C5S2PX\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eExtended runtime, heavy-duty use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003e12Ah\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e216Wh\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e5S3P\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e∼1540g\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eFL12000-21C5S3PX\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eMaximum runtime, professional\/site use\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eReplaces \/ Compatible With\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMilwaukee M18B6 (6Ah)\u003c\/li\u003e\n\u003cli\u003eMilwaukee M18B5 (5Ah)\u003c\/li\u003e\n\u003cli\u003eMilwaukee 48-11-1850 (5Ah XC)\u003c\/li\u003e\n\u003cli\u003eMilwaukee 48-11-1880 (8Ah XC)\u003c\/li\u003e\n\u003cli\u003eAll Milwaukee M18 and M18 FUEL cordless tools with standard M18 battery interface\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatible Tool Categories\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e🔧 \u003cstrong\u003eDrills \u0026amp; Drivers:\u003c\/strong\u003e M18 FUEL drill\/drivers, hammer drills, impact drivers\u003c\/li\u003e\n\u003cli\u003e🚜 \u003cstrong\u003eSaws:\u003c\/strong\u003e Circular saws, reciprocating saws, jigsaws, miter saws\u003c\/li\u003e\n\u003cli\u003e🔦 \u003cstrong\u003eLighting:\u003c\/strong\u003e M18 work lights and area lights\u003c\/li\u003e\n\u003cli\u003e⚙️ \u003cstrong\u003eGrinders \u0026amp; Sanders:\u003c\/strong\u003e Angle grinders, random orbital sanders\u003c\/li\u003e\n\u003cli\u003e🧰 \u003cstrong\u003eOther M18 Tools:\u003c\/strong\u003e Nailers, vacuums, radios, and all M18 platform tools\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eProfessional construction and contracting\u003c\/li\u003e\n\u003cli\u003eCarpentry, framing, and finishing work\u003c\/li\u003e\n\u003cli\u003eElectrical and plumbing installation\u003c\/li\u003e\n\u003cli\u003eAutomotive repair and maintenance\u003c\/li\u003e\n\u003cli\u003eDIY home improvement and renovation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1× FMA Milwaukee M18 18V Li-ion Battery Pack (capacity as selected)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eHow to Use\u003c\/h3\u003e\n\u003col\u003e\n\u003cli\u003eEnsure your Milwaukee M18 tool is powered off before inserting or removing the battery.\u003c\/li\u003e\n\u003cli\u003eAlign the battery pack with the tool’s battery slot and slide it in firmly until it clicks into place.\u003c\/li\u003e\n\u003cli\u003ePower on the tool and verify normal operation.\u003c\/li\u003e\n\u003cli\u003eCharge using a Milwaukee M18 compatible charger (e.g., M12-18C, M18C, or equivalent). The built-in BMS will manage charge termination automatically.\u003c\/li\u003e\n\u003cli\u003eFor long-term storage, charge to ~50% and store in a cool, dry place (15–25°C).\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003ch3\u003eImportant Cautions\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e⚠️ Use only a Milwaukee M18-compatible charger. Do not use Ni-MH, Ni-Cd, or unregulated chargers.\u003c\/li\u003e\n\u003cli\u003e⚠️ Do not short-circuit, puncture, crush, or disassemble the battery pack.\u003c\/li\u003e\n\u003cli\u003e⚠️ Do not expose to water, moisture, or extreme temperatures during use or storage.\u003c\/li\u003e\n\u003cli\u003e⚠️ Do not charge a damaged or swollen battery. Discontinue use immediately if abnormalities are detected.\u003c\/li\u003e\n\u003cli\u003e⚠️ Do not leave charging unattended for extended periods. Charge in a well-ventilated area away from flammable materials.\u003c\/li\u003e\n\u003cli\u003e⚠️ Keep out of reach of children.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSafety Information\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharging:\u003c\/strong\u003e Use a Milwaukee M18-compatible charger (21V max). Built-in BMS handles overcharge protection. Do not use non-compatible chargers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Store at ~50% charge (~18.5V) in a cool, dry place (15–25°C). Check and top up every 3–6 months if stored long-term.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperation:\u003c\/strong\u003e Do not short-circuit, puncture, crush, or disassemble. Avoid exposure to water or moisture.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature:\u003c\/strong\u003e Charge and discharge within 0°C–45°C. Do not charge below 0°C.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisposal:\u003c\/strong\u003e Discharge to safe voltage, then dispose of according to local lithium battery regulations. Do not incinerate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInspection:\u003c\/strong\u003e Inspect before each use. Do not use if swollen, damaged, or leaking.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eShipping \u0026amp; Transportation Notice\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThis product contains lithium-ion cells and is classified as dangerous goods (UN3481) for shipping purposes.\u003c\/li\u003e\n\u003cli\u003eAir transport is subject to IATA regulations. Additional documentation and handling time may be required.\u003c\/li\u003e\n\u003cli\u003eAll shipments comply with UN3481 packaging and labeling requirements. UN38.3 test report available upon request.\u003c\/li\u003e\n\u003cli\u003eEstimated delivery: 7–20 business days depending on destination and carrier.\u003c\/li\u003e\n\u003cli\u003eBrazil shipments require a valid Tax Number (CPF\/CNPJ). Some remote destinations may take up to 60 days.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"fmabattery","offers":[{"title":"M18 4AH","offer_id":46712436785341,"sku":"FL4000-21C5S1PB","price":45.45,"currency_code":"USD","in_stock":true},{"title":"M18 8AH","offer_id":46712436818109,"sku":"FL8000-21C5S2PX","price":69.95,"currency_code":"USD","in_stock":true},{"title":"M18 12AH","offer_id":46712436850877,"sku":"FL12000-21C5S3PX","price":113.82,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0732\/9133\/3821\/files\/10_f90107d4-79ea-4076-a202-a19f2fe999fe.jpg?v=1777281558","url":"https:\/\/fmabattery.com\/products\/m18-fuel-milwaukee-battery-18v-4ah-8ah-12ah-battery-m18b6-48-11-1850-xc-m18b5","provider":"fmabattery","version":"1.0","type":"link"}