{"product_id":"ferrex-r800-smart-replacement-battery-20v-3400mah-li-ion","title":"Ferrex R800 Smart 20V Li-ion Replacement Battery CA0005","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFerrex R800 Smart — 20V Li-ion Replacement Battery (CA0005)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 20V 3400mAh Li-ion battery for the Ferrex R800 Smart cordless lawn mower. It replaces OEM part CA0005 and fits directly into the mower's battery bay. Voltage and capacity match the original specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eR800 Smart platform fit:\u003c\/strong\u003e\n    The R800 Smart uses a 20V single-cell-group Li-ion pack with a proprietary connector and BMS handshake. This replacement matches the cell configuration and communication protocol so the mower's discharge management behaves as it would with the original pack.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through the R800 Smart's startup and cutting cycles. The BMS handled blade motor inrush without tripping, and cell voltage held steady across sustained cutting loads typical of a domestic lawn.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst use of the season:\u003c\/strong\u003e\n    If the mower has been stored over winter, bring the battery indoors overnight before use. Below 10°C, Li-ion cells have higher internal resistance. The blade motor inrush current on a cold pack can trip the BMS before you've cut a single 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 under thick grass or wet-grass blade load\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe R800 Smart's BMS monitors current draw on every cycle. Thick or wet grass forces the blade motor to pull significantly more current than it would on a dry, well-maintained lawn. When that inrush exceeds the BMS threshold, the pack cuts power to protect the cells. This is not a battery fault — it is the BMS doing its job. Let the mower sit for five minutes before restarting, and reduce pass width on dense growth to keep current draw within range.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger shows fault light after mower sat unused all winter\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion packs self-discharge slowly during storage. After several months in a cold garage, cell voltage can drop below the charger's acceptance threshold — typically around 2.5V per cell. The charger sees a pack that looks over-discharged and refuses to start a charge cycle. Some chargers have a recovery or trickle mode; connect the pack and wait up to 30 minutes to see if the fault clears as cells recover slightly. If cell voltage has dropped below 2.0V per cell, the pack is outside safe recovery range and needs replacing.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381282177114,"sku":"BWCS-WRS300PX-1","price":76.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381282209882,"sku":"BWCS-WRS300PX-2","price":90.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381282242650,"sku":"BWCS-WRS300PX-3","price":101.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WRS300PX-1.webp?v=1778899919","url":"https:\/\/batteryweb.com\/products\/ferrex-r800-smart-replacement-battery-20v-3400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}