{"product_id":"yard-force-sa800-pro-replacement-battery-28v-5000mah-li-ion","title":"Yard Force SA800 Pro 28V 5000mAh Replacement Battery","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eYard Force SA800 Pro \/ SA900 Series — 28V Li-ion Replacement Battery (862617)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 28V 5000mAh (140Wh) lithium-ion replacement battery for Yard Force robotic lawn mowers. It fits the SA800 Pro, SA900, SA500 Eco, SA600H, and more than 22 additional SA-series models. Voltage and connector match the original pack — the mower's docking and charge cycle work as normal.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSA-series platform fit:\u003c\/strong\u003e\n    All listed models share the same 28V battery bay, dock connector, and BMS handshake protocol. Swapping between SA500, SA600H, SA800 Pro, and SA900 requires no adapter or firmware change — the battery communicates the same state-of-charge data to each base unit.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through repeated blade-motor inrush loads on a SA800 Pro test unit. The BMS held cutoff thresholds steady across full discharge cycles and accepted a charge from the OEM dock without fault codes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eSeasonal storage tip:\u003c\/strong\u003e\n    Before bringing the mower back into service after winter, bring the battery indoors overnight if temperatures are below 10°C. Cold Li-ion cells carry higher internal resistance, and the blade motor's inrush current on a cold pack can trip the BMS before the mower completes its first row.\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 SA800 Pro's blade motor draws a short inrush spike each time it re-engages after an obstacle pause. In dense or wet grass, those spikes come more frequently and at higher current than on a dry, light lawn. If the BMS reads that sustained spike pattern as an overcurrent event, it trips and the mower halts mid-zone. Letting the pack rest for five minutes resets the BMS thermal flag — the mower will resume normally after that cooldown.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger not accepting the pack after winter storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells left in storage for several months will self-discharge past the BMS acceptance threshold — typically below 2.5V per cell. When a pack drops below that floor, the OEM dock refuses to begin a charge cycle and shows a fault light instead. To recover the pack, place it in a warm room (above 15°C) for two hours before attempting a charge. If the dock still shows a fault after warming, the cells have discharged too deeply for safe recovery and the pack needs replacing.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381296693338,"sku":"BWCS-YFA800PW-1","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381296726106,"sku":"BWCS-YFA800PW-2","price":116.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381296758874,"sku":"BWCS-YFA800PW-3","price":129.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-YFA800PW-1.webp?v=1778899964","url":"https:\/\/batteryweb.com\/products\/yard-force-sa800-pro-replacement-battery-28v-5000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}