{"product_id":"ambrogio-40-basic-4wd-premium-replacement-battery-259v-10200mah-li-ion","title":"Ambrogio 4.0 Basic 25.9V Replacement Battery 101-806","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAmbrogio 4.0 Basic 4WD Premium — 25.9V Li-ion Replacement Battery (101-806)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 25.9V, 10200mAh (264.18Wh) lithium-ion battery for the Ambrogio 4.0 Basic 4WD Premium robotic lawn mower. It also fits the 4.0 Elite 4WD Premium, 4.36 Elite 4WD Ultra Premium, and L200 series. The OEM part numbers it replaces include 101-806, 1126-9105-01, and 1126-9138-01.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e4.0 and 4.36 4WD series compatibility:\u003c\/strong\u003e\n    These models share the same 25.9V (7S Li-ion) architecture and deck connector pinout. The BMS handshake protocol and charge termination voltage are identical across the range, so one cell pack covers the full 4WD Premium lineup.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through full charge and discharge on the 4.0 Basic 4WD platform. The BMS held cell balance within 20mV across the 7S string and triggered over-current protection correctly on a simulated blade-stall event.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eSpring start-up tip:\u003c\/strong\u003e\n    Before first use of the season, bring the battery indoors overnight if temperatures are below 10°C. Cold Li-ion cells carry higher internal resistance, and the blade motor 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 during thick-grass or wet-grass cutting\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe 4WD drive system pulls current from all four wheel motors simultaneously while the blade motor is running. On dense or wet grass, blade drag spikes the total draw sharply. If that combined inrush exceeds the BMS over-current threshold — typically around 30–40A on this pack — the battery shuts off instantly to protect the cells. A new pack with fresh cells will handle this surge better than a degraded original, but the mower's terrain sensitivity setting also affects how aggressively it drives into a heavy patch.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger shows fault light after mower sat all winter\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRobotic mowers left docked but unpowered through winter self-discharge slowly, and a 25.9V (7S) pack can drop below the charger's minimum acceptance voltage — often 20V on Ambrogio OEM chargers. Below that threshold, the charger reads the pack as faulty and refuses to start a charge cycle. To recover it, place the battery in a warmer environment (above 15°C) for two hours, then reconnect. If cell voltage has dropped below 2.5V per cell (17.5V pack total), the BMS may have entered deep-discharge lockout and the pack will need replacement.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381279752282,"sku":"BWCS-ABL510VX-1","price":164.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43381279785050,"sku":"BWCS-ABL510VX-2","price":195.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43381279817818,"sku":"BWCS-ABL510VX-3","price":218.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABL510VX-1.webp?v=1778899901","url":"https:\/\/batteryweb.com\/products\/ambrogio-40-basic-4wd-premium-replacement-battery-259v-10200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}