{"product_id":"stihl-ak-20-battery-144wh","title":"AK 20 Battery","description":"\u003ch1\u003eSTIHL AK 20 Battery — 36V 144Wh Lithium-Ion\u003c\/h1\u003e\n\n\u003cp\u003eThe \u003cstrong\u003eSTIHL AK 20\u003c\/strong\u003e is a powerful 36V lithium-ion battery for tools in the STIHL AK System. With 4.0Ah capacity, 144Wh energy and a weight of 1.2kg, it offers a strong balance of runtime, handling and performance for homeowners maintaining gardens, lawns, hedges and outdoor spaces.\u003c\/p\u003e\n\n\u003cp\u003eIt's \u003cstrong\u003ein stock at Gustharts\u003c\/strong\u003e as an authorised STIHL dealer, with free UK delivery on this order.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatibility note:\u003c\/strong\u003e the AK 20 delivers full power with most AK System tools, but runs at reduced power with the MSA 70 chainsaw and REA 60 PLUS pressure washer, and cannot be used with the MSA 80 chainsaw.\u003c\/p\u003e\n\n\u003cp\u003eBuilt with STIHL intelligent battery management, the AK 20 delivers CONSTANT POWER output so compatible tools maintain consistent performance as the battery discharges. Four LED indicators clearly show remaining charge, and a cold start feature protects the cells by warming them in a controlled way, allowing operation down to -20°C.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e36V, 4.0Ah, 144Wh\u003c\/strong\u003e lithium-ion battery for AK System tools\u003c\/li\u003e\n\u003cli\u003eLightweight at 1.2kg\u003c\/li\u003e\n\u003cli\u003eIntegrated 4-LED charge indicator\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCONSTANT POWER\u003c\/strong\u003e output for consistent tool performance\u003c\/li\u003e\n\u003cli\u003eIntelligent battery management system\u003c\/li\u003e\n\u003cli\u003eCold start feature for operation down to -20°C\u003c\/li\u003e\n\u003cli\u003eCompatible with AL 101, AL 301 and AL 501 chargers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eTechnical Details\u003c\/h2\u003e\n\u003cdiv style=\"max-width:600px;background:#fff;border:1px solid #e5e5e5;border-radius:20px;box-shadow:0 2px 6px rgba(0,0,0,.03);overflow:hidden;\"\u003e\n\u003ctable style=\"width:100%;border-collapse:collapse;table-layout:fixed;\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"width:42%;\"\u003e\n\u003ccol style=\"width:58%;\"\u003e\n\u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth style=\"background:#f8f8f8;font-weight:600;text-align:left;padding:18px 20px;font-size:14px;color:#111;border-bottom:1px solid #e5e5e5;\"\u003eBattery Type\u003c\/th\u003e\n\u003ctd style=\"padding:18px 20px;font-size:14px;line-height:1.5;color:#111;border-bottom:1px solid #e5e5e5;\"\u003eLithium-ion, STIHL AK System\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"background:#f8f8f8;font-weight:600;text-align:left;padding:18px 20px;font-size:14px;color:#111;border-bottom:1px solid #e5e5e5;\"\u003eVoltage\u003c\/th\u003e\n\u003ctd style=\"padding:18px 20px;font-size:14px;line-height:1.5;color:#111;border-bottom:1px solid #e5e5e5;\"\u003e36V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"background:#f8f8f8;font-weight:600;text-align:left;padding:18px 20px;font-size:14px;color:#111;border-bottom:1px solid #e5e5e5;\"\u003eCapacity \/ Energy\u003c\/th\u003e\n\u003ctd style=\"padding:18px 20px;font-size:14px;line-height:1.5;color:#111;border-bottom:1px solid #e5e5e5;\"\u003e4.0Ah \/ 144Wh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"background:#f8f8f8;font-weight:600;text-align:left;padding:18px 20px;font-size:14px;color:#111;border-bottom:1px solid #e5e5e5;\"\u003eWeight\u003c\/th\u003e\n\u003ctd style=\"padding:18px 20px;font-size:14px;line-height:1.5;color:#111;border-bottom:1px solid #e5e5e5;\"\u003e1.2kg\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth style=\"background:#f8f8f8;font-weight:600;text-align:left;padding:18px 20px;font-size:14px;color:#111;\"\u003eCompatible Chargers\u003c\/th\u003e\n\u003ctd style=\"padding:18px 20px;font-size:14px;line-height:1.5;color:#111;\"\u003eAL 101, AL 301, AL 501\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003ch2\u003eWhy Choose the STIHL AK 20?\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eSTIHL\u003c\/strong\u003e is one of the world's leading outdoor power tool brands, and the AK 20 sits in the middle of the AK System battery range — more runtime than the entry-level AK 10, without the size and cost of the AK 30. It's a solid default choice for most domestic AK System tools, provided your specific tool isn't on the reduced-power or incompatible list above.\u003c\/p\u003e\n\n\u003ch2\u003ePairs Well With\u003c\/h2\u003e\n\u003cp\u003eComplete your setup with a compatible \u003ca href=\"\/en-us\/collections\/stihl-battery-chargers\"\u003eSTIHL AL charger\u003c\/a\u003e, or browse the full range of \u003ca href=\"\/en-us\/collections\/stihl-battery-machinery-range\"\u003eSTIHL AK System tools\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eAlso Known As\u003c\/h2\u003e\n\u003cp\u003eAlso searched for as: STIHL AK20 battery, STIHL AK System battery, 36V STIHL battery, AK20 144Wh.\u003c\/p\u003e\n\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich tools is the AK 20 compatible with?\u003c\/summary\u003e\n\u003cp\u003eMost tools in the STIHL AK System range at full power, with reduced power on the MSA 70 chainsaw and REA 60 PLUS pressure washer, and no compatibility with the MSA 80 chainsaw.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eWhich chargers work with the AK 20?\u003c\/summary\u003e\n\u003cp\u003eSTIHL AL 101, AL 301 and AL 501 chargers.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eCan it be used in cold weather?\u003c\/summary\u003e\n\u003cp\u003eYes — a cold start feature warms the cells in a controlled way, allowing operation down to -20°C.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow do I check the remaining charge?\u003c\/summary\u003e\n\u003cp\u003eFour integrated LED indicators show the current charge level.\u003c\/p\u003e\n\u003c\/details\u003e\n\u003cdetails\u003e\n\u003csummary\u003eHow does the AK 20 compare to the AK 10 and AK 30?\u003c\/summary\u003e\n\u003cp\u003eThe AK 20 sits between them — more capacity and runtime than the AK 10, less than the AK 30, at a lighter weight.\u003c\/p\u003e\n\u003c\/details\u003e","brand":"Stihl","offers":[{"title":"Default Title","offer_id":45718386540788,"sku":"LI-4520 400 6535","price":133.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0690\/6603\/1348\/files\/Stihl-AK-20-Battery.png?v=1770906403","url":"https:\/\/www.gustharts.com\/en-us\/products\/stihl-ak-20-battery-144wh","provider":"Gustharts","version":"1.0","type":"link"}