{"product_id":"m18-18v-battery-rebuild-case-pcb-protection-board-milwaukee","title":"M18 18V Battery Rebuild Case \u0026 PCB Protection Board for Milwaukee","description":"\n\u003ch2\u003eM18 18V Battery Plastic Case \u0026amp; PCB Charge Protection Circuit Board — Compatible with Milwaukee 48-11-1815\u003c\/h2\u003e\n\n\u003cp\u003eGive your Milwaukee M18 power tool battery a second life with this complete rebuild kit. This listing includes a brand-new plastic outer shell and a PCB charge protection circuit board — \u003cstrong\u003eno battery cells are included\u003c\/strong\u003e. Designed for experienced DIY technicians and battery repair professionals who want to restore a 3Ah, 6Ah, or 9Ah Milwaukee 18V battery pack using their own 18650 lithium-ion cells.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003e⚠️ Important Notice:\u003c\/strong\u003e This product does \u003cstrong\u003eNOT\u003c\/strong\u003e contain battery cells. It is a shell and circuit board only, intended for persons with hands-on experience in lithium-ion battery assembly. If you are not familiar with battery pack assembly, voltage balancing, and spot welding, please do not order this product.\u003c\/p\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePlastic outer case\u003c\/strong\u003e — compatible with Milwaukee M18 48-11-1815 battery form factor\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePCB charge protection circuit board\u003c\/strong\u003e — provides overcharge, over-discharge, and short-circuit protection\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCase stickers \/ labels\u003c\/strong\u003e — for a clean, professional finish\u003c\/li\u003e\n  \u003cli\u003eAvailable in three configurations: \u003cstrong\u003e5 × 18650\u003c\/strong\u003e (approx. 3Ah), \u003cstrong\u003e10 × 18650\u003c\/strong\u003e (approx. 6Ah), \u003cstrong\u003e15 × 18650\u003c\/strong\u003e (approx. 9Ah)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e100% brand new — aftermarket replacement components\u003c\/li\u003e\n  \u003cli\u003eCompatible with Milwaukee M18 platform tool battery housings\u003c\/li\u003e\n  \u003cli\u003ePCB board supports 18650 lithium-ion cell configuration (5S\/10S\/15S arrangements)\u003c\/li\u003e\n  \u003cli\u003eIntegrated charge protection: guards against overvoltage, undervoltage, and overcurrent conditions\u003c\/li\u003e\n  \u003cli\u003eDurable ABS plastic shell designed to the original Milwaukee M18 battery dimensions\u003c\/li\u003e\n  \u003cli\u003eIncludes authentic-style case stickers and labels for a finished look\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAssembly Instructions \u0026amp; Notes\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003e\u003cstrong\u003eUse 18650 power-grade lithium-ion cells only.\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003eFor new cells: ensure all cells in a group (5, 10, or 15) are matched in internal resistance and charged to the same voltage before assembly.\u003c\/li\u003e\n  \u003cli\u003eFor rebuilt\/used cells: test the voltage at both ends of each cell and equalize all cells to the same voltage before welding.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCritical:\u003c\/strong\u003e All cells MUST be at the same voltage before soldering or spot-welding the PCB into place.\u003c\/li\u003e\n  \u003cli\u003eRefer to the circuit board connection diagram (see product images) for proper wiring layout.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003cp\u003eFor general electrical safety guidance when working with lithium-ion battery systems, refer to the U.S. Consumer Product Safety Commission (CPSC) — Lithium-Ion Battery Safety.\u003c\/p\u003e\n\n\u003cp\u003eFor workplace safety when handling and assembling battery packs, see \u003ca href=\"https:\/\/www.osha.gov\/electrical\" target=\"_blank\" rel=\"noopener noreferrer\"\u003eOSHA Electrical Safety Resources\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\n\u003ch4\u003eQ: Does this M18 battery rebuild kit include 18650 lithium-ion cells?\u003c\/h4\u003e\n\u003cp\u003eA: No. This kit includes only the plastic outer shell, the PCB charge protection circuit board, and case stickers\/labels. You must supply your own 18650 lithium-ion power cells separately. Please do not order if you require a ready-to-use battery pack.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Which Milwaukee battery models is this case compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This plastic case and PCB board are designed to be compatible with Milwaukee M18 18-volt battery packs, specifically referencing the Milwaukee 48-11-1815 form factor. It supports rebuild configurations of 5, 10, or 15 × 18650 cells, corresponding to approximately 3Ah, 6Ah, and 9Ah capacity packs.\u003c\/p\u003e\n\n\u003ch4\u003eQ: What does the PCB charge protection circuit board do?\u003c\/h4\u003e\n\u003cp\u003eA: The PCB (Printed Circuit Board) protection module monitors the lithium-ion cells and protects against overcharging, over-discharging, overcurrent, and short-circuit conditions. It is an essential safety component in any lithium-ion battery pack rebuild and helps extend the life of your cells.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Is prior experience required to assemble this battery rebuild kit?\u003c\/h4\u003e\n\u003cp\u003eA: Yes. This product is intended strictly for individuals who are experienced with 18650 lithium-ion battery pack assembly, including voltage balancing, spot welding or soldering, and PCB wiring. Improper assembly of lithium-ion cells can be dangerous. If you are not confident in your technical abilities, please seek professional assistance.\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"Does this M18 battery rebuild kit include 18650 lithium-ion cells?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No. This kit includes only the plastic outer shell, the PCB charge protection circuit board, and case stickers\/labels. You must supply your own 18650 lithium-ion power cells separately. Please do not order if you require a ready-to-use battery pack.\"}}, {\"@type\": \"Question\", \"name\": \"Which Milwaukee battery models is this case compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This plastic case and PCB board are designed to be compatible with Milwaukee M18 18-volt battery packs, specifically referencing the Milwaukee 48-11-1815 form factor. 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