{"product_id":"festool-18v-4-0ah-tabless-bluetooth-battery-pack-578745","title":"Festool 18V 4.0Ah Tabless Bluetooth Battery Pack (578745)","description":"\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/89vtGLNZlX8?si=fpavRZjcBOc8uWxP\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen\u003e\u003c\/iframe\u003e\u003csection data-aplus\u003e\n\u003cdetails id=\"product-features\" class=\"acc\" open\u003e\n  \u003csummary\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"features\"\u003e\n      \u003cdiv class=\"card\"\u003e\n        \u003cdiv class=\"card-inside\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/voltage.svg\" alt=\"voltage\" class=\"aplusicon\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv\u003e\u003cstrong\u003e18V System Fit\u003c\/strong\u003e\u003c\/div\u003e\n        \u003cdiv class=\"feature-card\"\u003eBuilt for Festool 18-volt cordless tools, this battery pack gives you one power source across a broad range of jobs instead of juggling mixed platforms.\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"card\"\u003e\n        \u003cdiv class=\"card-inside\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/power-source.svg\" alt=\"power-source\" class=\"aplusicon\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv\u003e\u003cstrong\u003eTabless Battery Design\u003c\/strong\u003e\u003c\/div\u003e\n        \u003cdiv class=\"feature-card\"\u003eThe Festool BP 18 TBX 4 C-ASI battery pack uses tabless battery construction aimed at delivering strong output while keeping weight down where handling matters.\u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"card\"\u003e\n        \u003cdiv class=\"card-inside\"\u003e\n          \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/weight.svg\" alt=\"weight\" class=\"aplusicon\"\u003e\n        \u003c\/div\u003e\n        \u003cdiv\u003e\u003cstrong\u003ePower Without Bulk\u003c\/strong\u003e\u003c\/div\u003e\n        \u003cdiv class=\"feature-card\"\u003eFestool positions this pack for maximum power with lightweight handling, which matters when you are working overhead, sanding longer, or moving from task to task.\u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-overview\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003eOverview\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\" data-product-summary\u003e\n    \u003cp\u003eThe Festool BP 18 TBX 4 C-ASI Tabless Battery Pack, Model 578745, is a cordless tool battery designed for powering Festool 18-volt tools across a wide range of applications. This is a battery pack designed for cordless tool runtime and power delivery. If you already run Festool cordless gear and want one battery option focused on strong output without unnecessary weight, this is the piece to look at.\u003c\/p\u003e\n    \u003cp\u003eWhat matters here is the balance Festool is aiming for. The product description calls out maximum power but lightweight handling, which is exactly what users want from a modern 18V battery pack. On the job, that translates to less fatigue in tools that stay in your hand for longer stretches, especially sanding and other repetitive work where every bit of weight shows up by the end of the day.\u003c\/p\u003e\n    \u003cp\u003eThe big differentiator is the tabless battery design. Festool built the BP 18 TBX 4 C-ASI around that construction to support high-demand cordless applications while keeping the pack compact and manageable. For buyers comparing battery options, that means this is not just another spare pack. It is meant to support strong tool performance while helping the tool stay balanced in use.\u003c\/p\u003e\n    \u003cp\u003eSystem fit is another reason this battery matters. Festool lists it for all applications and 18-volt devices, with a few specific exceptions. That broad compatibility makes it a practical battery for users who already own multiple Festool cordless tools and want to stay within one 18V platform instead of buying application-specific packs for every tool.\u003c\/p\u003e\n    \u003cp\u003eThere is also a real usability angle here beyond raw power. A lighter battery pack can make a noticeable difference on finish work, detail sanding, punch-list tasks, and any job where control matters as much as output. If your work has you reaching, repositioning, or holding a cordless tool at odd angles, lower battery weight is not a spec-sheet detail. It changes how the tool feels all day.\u003c\/p\u003e\n    \u003cp\u003eThe main compatibility note is important: Festool excludes the ETSC 125, RTSC 400, and DTSC 400 from this battery pack's fitment. Outside of those tools, this 18-volt Festool battery pack is positioned as a broad-use option for the platform.\u003c\/p\u003e\n    \u003cp\u003eWho should buy it? Festool cordless users who want a genuine platform battery for everyday use, especially those who care about tool balance as much as runtime. It makes the most sense for current Festool 18V owners, trade users running multiple cordless tools, and serious DIY users who want to stay within the Festool cordless system with a battery pack designed around power and lower carry weight.\u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-benefits\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003eSee Battery Status at a Glance\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"row\"\u003e\n      \u003cdiv class=\"img\"\u003e\n        \u003cimg src=\"https:\/\/cdn.anglera.com\/assets\/74d6ed76-fe0d-4d23-a9db-1f8749ca9ef2\/4014549464519_1.jpg\" alt=\"Festool BP 18 TBX 4 C-ASI battery pack installed on a cordless sander while a user checks the battery status indicator during finish sanding on a work surface\" class=\"tnblock-img\"\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"copy\"\u003e\n        \u003cp\u003eA cordless battery is only useful if it keeps the tool practical in your hands. The Festool BP 18 TBX 4 C-ASI is built for real cordless work, with a lightweight design focus and clear battery status visibility while installed on the tool.\u003c\/p\u003e\n        \u003cul\u003e\n          \u003cli\u003eDesigned for Festool 18-volt cordless tools across a wide range of applications\u003c\/li\u003e\n          \u003cli\u003eFestool highlights maximum power with reduced weight as the core benefit\u003c\/li\u003e\n        \u003c\/ul\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-key-specifications\" class=\"acc\" open\u003e\n  \u003csummary\u003e\u003ch2\u003eKey Specifications\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003ctable class=\"aplusspecs\"\u003e\n      \u003ctr\u003e\n        \u003cth\u003eProduct Type\u003c\/th\u003e\n        \u003ctd\u003eTabless battery pack\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eVoltage (V)\u003c\/th\u003e\n        \u003ctd\u003e18 V\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003ePrimary Use\u003c\/th\u003e\n        \u003ctd\u003eFor all applications and 18-volt devices\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eDesign Focus\u003c\/th\u003e\n        \u003ctd\u003eMaximum power with lightweight handling\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003ePlatform\u003c\/th\u003e\n        \u003ctd\u003eFestool 18V cordless system\u003c\/td\u003e\n      \u003c\/tr\u003e\n      \u003ctr\u003e\n        \u003cth\u003eCompatibility Note\u003c\/th\u003e\n        \u003ctd\u003eNot for ETSC 125, RTSC 400, or DTSC 400\u003c\/td\u003e\n      \u003c\/tr\u003e\n    \u003c\/table\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-compatibility\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003eCompatibility\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"compat-list\"\u003e\n      \u003cdiv class=\"compat-row\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/voltage.svg\" alt=\"voltage\" class=\"icon-sm\"\u003e\n        \u003cdiv\u003e\n          \u003cstrong\u003eBattery Platform\u003c\/strong\u003e\n          \u003cdiv class=\"compat-detail\"\u003eFits Festool 18-volt cordless tools and applications across the platform.\u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n      \u003cdiv class=\"compat-row\"\u003e\n        \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/specs.svg\" alt=\"specs\" class=\"icon-sm\"\u003e\n        \u003cdiv\u003e\n          \u003cstrong\u003eExceptions\u003c\/strong\u003e\n          \u003cdiv class=\"compat-detail\"\u003eFestool lists this battery pack as not compatible with the ETSC 125, RTSC 400, and DTSC 400.\u003c\/div\u003e\n        \u003c\/div\u003e\n      \u003c\/div\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-pro-tips\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003ePro Tip\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"tip-row\"\u003e\n      \u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/specs.svg\" alt=\"specs\" class=\"icon-lg\"\u003e\n      \u003cp class=\"tip-text\"\u003eIf you use cordless tools for longer sanding sessions or overhead work, a lighter battery pack usually makes the tool feel better balanced and easier to control. That is where a battery like this earns its keep, even before you think about runtime.\u003c\/p\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-tool-nut-take\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003eTool Nut's Take\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cdiv class=\"eyebrow\"\u003eTool Nut's Take\u003c\/div\u003e\n    \u003ch3\u003eFestool BP 18 TBX 4 C-ASI for users who care how the tool feels\u003c\/h3\u003e\n    \u003cp\u003eThe Festool BP 18 TBX 4 C-ASI Tabless Battery Pack makes the most sense for Festool users who want solid 18V power without hanging extra weight off the bottom of the tool.\u003c\/p\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWho it's for:\u003c\/strong\u003e Festool 18V owners, trade users, and serious DIY buyers who want a platform battery for everyday cordless work.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWhy it stands out:\u003c\/strong\u003e The tabless battery design and the focus on maximum power with lightweight handling are the real story here.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWorth knowing:\u003c\/strong\u003e Check your tool list before you buy. Festool specifically excludes the ETSC 125, RTSC 400, and DTSC 400.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails id=\"product-faqs\" class=\"acc\"\u003e\n  \u003csummary\u003e\u003ch2\u003eCommon Questions\u003c\/h2\u003e\u003c\/summary\u003e\n  \u003cdiv class=\"acc-body\"\u003e\n    \u003cul\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWhat is the Festool BP 18 TBX 4 C-ASI?\u003c\/strong\u003e It is a tabless battery pack for Festool 18-volt cordless tools.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWhat tools does it fit?\u003c\/strong\u003e Festool lists it for all applications and 18-volt devices, except the ETSC 125, RTSC 400, and DTSC 400.\u003c\/li\u003e\n      \u003cli\u003e\n\u003cstrong\u003eWhat is the main benefit of this battery pack?\u003c\/strong\u003e Festool positions it for maximum power with lightweight handling, which helps keep cordless tools more manageable in use.\u003c\/li\u003e\n    \u003c\/ul\u003e\n  \u003c\/div\u003e\n\u003c\/details\u003e\n\u003c\/section\u003e","brand":"Festool","offers":[{"title":"Default Title","offer_id":53200252141862,"sku":"578745","price":85.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0933\/1582\/5958\/files\/down_bs_bp18TBX4Casi_578745_a_01a.jpg?v=1778780368","url":"https:\/\/www.toolnut.com\/products\/festool-18v-4-0ah-tabless-bluetooth-battery-pack-578745","provider":"Tool Nut","version":"1.0","type":"link"}