{"product_id":"al-ko-441188-replacement-battery-259v-5000mah-li-ion","title":"AL-KO 441188 Cordless Mower Replacement Battery 25.9V 5000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAL-KO Robolino 116 \/ 4000 Series — 25.9V Li-ion Replacement Battery (441188)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 25.9V, 5000mAh Li-ion replacement battery for AL-KO cordless lawn mowers. It fits the 441188 and 440530 battery platform, covering the Robolino 116, Robolino 4000, and over nineteen compatible AL-KO mower models. Voltage and connector match the original AL-KO specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRobolino 116 and 4000 platform fitment:\u003c\/strong\u003e\n    These models share the same 25.9V battery rail, connector housing, and BMS handshake protocol. A single battery SKU covers all variants in this range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through the full AL-KO charge cycle and confirmed BMS communication, cell balancing, and protection cutoffs all responded correctly across discharge and charge phases.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eSeasonal storage tip:\u003c\/strong\u003e\n    If the mower has sat unused through winter, bring the battery indoors overnight before the first spring cut. Below 10°C, Li-ion cells have higher internal resistance, and the blade motor's inrush current can trip the BMS on a cold pack before the cells have a chance to warm up.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS cutoff on thick-grass or wet-grass blade load\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe AL-KO blade motor draws a sharp current spike when it bites into dense or wet grass. If the pack's state of charge is already below 50%, that inrush can push instantaneous current beyond the BMS protection threshold, triggering an abrupt cutoff. This is a protection event, not a faulty battery. Let the pack rest for two minutes, then resume cutting at a slower walking pace to reduce motor load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger showing a fault light after the mower sat in the garage all winter\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells self-discharge slowly during long storage. If cell voltage drops below approximately 2.5V per cell, the charger's intake circuit reads the pack as outside acceptable range and refuses to initiate a charge cycle. To recover it, place the pack in a warm room — above 15°C — for two hours, then reconnect to the charger. Most AL-KO chargers will re-accept the pack once internal temperature stabilises and cell voltage reads above the entry threshold.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381310029914,"sku":"BWCS-AKR116VX-1","price":127.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381310062682,"sku":"BWCS-AKR116VX-2","price":150.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381310095450,"sku":"BWCS-AKR116VX-3","price":168.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-AKR116VX-1.webp?v=1778899944","url":"https:\/\/batteryweb.com\/products\/al-ko-441188-replacement-battery-259v-5000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}