{"product_id":"al-ko-easy-flex-348-li-lawnmower-replacement-battery-20v-4950mah-li-ion","title":"AL-KO B50 20V Cordless Lawnmower Replacement Battery 4950mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAL-KO Easy Flex 34.8 Li Lawnmower — 20V Li-ion Replacement Battery (B50)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 20V Li-ion replacement battery rated at 4950mAh (99Wh), built to the B50 specification. It fits the AL-KO Easy Flex 34.8 Li Lawnmower along with the Easy Flex GT 2025 Grass Trimmer, HT 2050 Hedge Trimmer, HTA 2050 Long Reach Hedge Trimmer, and more than 30 additional Easy Flex platform tools. Voltage and connector format match the original AL-KO pack exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEasy Flex platform compatibility:\u003c\/strong\u003e\n    All listed models share the same 20V rail voltage, B50 connector footprint, and BMS handshake protocol. AL-KO uses a common battery interface across the Easy Flex range, so one pack moves between the mower, trimmer, and hedger without adapters or firmware issues.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack on the Easy Flex 34.8 Li drive system and monitored the BMS through motor-start inrush events. The protection circuit held steady across repeated blade engagement cycles without tripping overcurrent cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMotor inrush conditioning on first use:\u003c\/strong\u003e\n    Run the mower at half-load across two cycles before tackling thick or wet grass. This allows the BMS to profile the blade motor's inrush current and set accurate overcurrent thresholds before you push the system to its ceiling.\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 blade engagement in dense grass\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe Easy Flex 34.8 Li blade motor pulls a sharp inrush spike the instant it engages under load. A new or cold battery has higher internal resistance than a warmed-up pack, which amplifies the voltage dip at the cell level during that spike. If the dip crosses the BMS undervoltage threshold, the protection circuit shuts the pack down before the motor reaches full speed. Letting the pack warm up to above 10°C and running one lighter cycle first brings internal resistance down enough to clear the threshold on blade engagement.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger blinking red and refusing to accept a new pack from storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion chargers require a minimum cell voltage — typically around 2.5V per cell — before the charge cycle initiates. A pack that has sat in storage for several months can self-discharge below that acceptance floor, putting the charger into a fault-blink state rather than a charge state. To recover the pack, connect it to the charger and disconnect it five times in quick succession — some AL-KO chargers use this to trigger a trickle pre-charge mode that brings cells back above the acceptance threshold. If cells recover past 2.8V per cell, the charger will switch to its normal CC\/CV charge profile.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381301117018,"sku":"BWCS-WRX352PX-1","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381301149786,"sku":"BWCS-WRX352PX-2","price":115.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381301182554,"sku":"BWCS-WRX352PX-3","price":128.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-WRX352PX-1.webp?v=1779759628","url":"https:\/\/batteryweb.com\/products\/al-ko-easy-flex-348-li-lawnmower-replacement-battery-20v-4950mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}