{"product_id":"55a-21v-lithium-chainsaw-controller-circuit-board-electric-saw","title":"55A 21V Lithium Chainsaw Controller Circuit Board | Electric Saw","description":"\u003ch2\u003e55A \/ 21V Lithium Electric Chainsaw Control Board\u003c\/h2\u003e\n\u003cp\u003eUpgrade or replace the drive controller in your rechargeable electric chainsaw with this reliable \u003cstrong\u003e55A 21V Chainsaw Controller Circuit Board\u003c\/strong\u003e. Designed for universal electric tool compatibility, this control board delivers stable power management and smooth motor drive performance — keeping your cordless chainsaw running at its best.\u003c\/p\u003e\n\n\u003cp\u003eMade in Mainland China.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRated Current:\u003c\/strong\u003e 55A\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e 21V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Plastic + Metal (durable construction)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Universal electric chainsaw \/ electric tool applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e As shown (base plate or wiring color may vary — functions are identical)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eImportant Setup Instructions\u003c\/h3\u003e\n\u003cp\u003eTo avoid damaging the control board, please follow these steps carefully before first use:\u003c\/p\u003e\n\u003col\u003e\n  \u003cli\u003eConnect all wiring securely.\u003c\/li\u003e\n  \u003cli\u003eFix the motor firmly in place.\u003c\/li\u003e\n  \u003cli\u003eInstall the outer casing.\u003c\/li\u003e\n  \u003cli\u003eTighten all screws.\u003c\/li\u003e\n  \u003cli\u003eConfirm the square shaft of the head rotates freely without binding or jamming.\u003c\/li\u003e\n  \u003cli\u003eConnect the power supply.\u003c\/li\u003e\n  \u003cli\u003ePress down the speed control switch — ensure there is \u003cstrong\u003eno gap\u003c\/strong\u003e in the shell. A gap may cause a buzzing alarm.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003ePlease follow these requirements to prevent motherboard damage.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003ch3\u003ePackage Contents\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 × Chainsaw Control Board \/ Controller Circuit Board\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003ePlease Note\u003c\/h3\u003e\n\u003cp\u003eThere may be minor differences in wiring color, base plate color, or other visual aspects between the actual product and product images — all functions remain exactly the same. Colors on screen may also vary slightly due to monitor brightness and lighting conditions.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products You May Find Useful\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1pc-10g-high-grade-silicon-grease-lubricant-o-lubrication-good-odorless-smoothness-for-o-rings-tube-silicone-grease-lubricant\"\u003e1PC 10g High Grade Silicone Grease Lubricant for O-Rings \u0026amp; Tools\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/3pcs-silicone-sealant-scraper-set-multi-functional-caulking-nozzle-tools-for-tile-floor-joints-grout-finishing-and-renovation\"\u003e3PCS Silicone Sealant Scraper Set – Multi-Functional Caulking \u0026amp; Renovation Tools\u003c\/a\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003ca href=\"\/products\/1pc-multi-use-faucet-bubbler-wrenches-6-sizes-sink-wrenches-detach-tool-for-kitchen-bathroom-faucet-parts-repair-spanner\"\u003e1PC Multi-Use Faucet Bubbler Wrenches – 6 Sizes Repair Spanner\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eLearn more: \u003ca href=\"https:\/\/www.osha.gov\/hand-power-tools\" target=\"_blank\" rel=\"noopener\"\u003eOSHA guidance on hand and power tools\u003c\/a\u003e\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003ch4\u003eQ: What type of chainsaw is this 55A 21V controller board compatible with?\u003c\/h4\u003e\n\u003cp\u003eA: This chainsaw controller circuit board is designed for universal electric chainsaw and electric tool applications running on a 21V lithium battery system with up to 55A current. Always verify your tool's voltage and amperage requirements before installation.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Why does my chainsaw emit a buzzing alarm after installing the control board?\u003c\/h4\u003e\n\u003cp\u003eA: A buzzing alarm is typically caused by a gap remaining in the outer shell after assembly. Make sure the speed control switch is fully pressed down and the casing is completely closed with no gaps before powering on the unit.\u003c\/p\u003e\n\n\u003ch4\u003eQ: Will I receive exactly the control board shown in the product images?\u003c\/h4\u003e\n\u003cp\u003eA: The wiring color or base plate color of the actual board may differ slightly from the images due to batch variations, but all electrical functions and specifications remain exactly the same. If you require a specific color configuration, please consider this carefully before ordering.\u003c\/p\u003e\n\u003c!-- production-packaging-notice --\u003e\n\u003ch3\u003eProduction \u0026amp; Packaging Notice\u003c\/h3\u003e\n\u003cp\u003eTo maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.\u003c\/p\u003e\n\u003cscript type=\"application\/ld+json\"\u003e{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"What type of chainsaw is this 55A 21V controller board compatible with?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"This chainsaw controller circuit board is designed for universal electric chainsaw and electric tool applications running on a 21V lithium battery system with up to 55A current. 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