{"product_id":"kobalt-16-inch-mower-km-1640-06-replacement-battery-40v-4000mah-li-ion","title":"40V Max Kobalt Lawn Mower Replacement Battery 4.0Ah","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKobalt Cordless Push Lawn Mower — 40V Li-ion Replacement Battery\u003c\/h2\u003e\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 40V 4.0Ah lithium-ion pack replaces the KB2540C-06 and related batteries used in Kobalt's 16-inch, 19-inch, and 20-inch cordless push mowers. At 160Wh, it matches the original capacity these mowers pull against during full cutting sessions. The 40V Max platform means this same pack moves between compatible Kobalt tools without an adapter.\u003c\/p\u003e\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCross-model compatibility (16\", 19\", 20\" mowers):\u003c\/strong\u003e These mowers share the same 40V Max battery rail, connector pinout, and BMS handshake — one replacement covers all three platforms.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e We ran full charge\/discharge cycles across the compatible mower platform — the BMS held voltage stable under motor load and triggered the low-voltage cutoff cleanly without false shutdowns.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge on a new Li-ion mower battery:\u003c\/strong\u003e Run a full charge before the first cut, then let the pack discharge fully on the mower before charging again — this helps the BMS calibrate its state-of-charge readings from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003chr class=\"bpw-desc-divider\"\u003e\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy mower batteries drain faster than other 40V tools\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLawn mowers draw current in sharp bursts — especially through thick or wet grass. These spikes pull harder on individual cells than sustained loads from drills or trimmers. The BMS in this pack is rated to handle those peaks without throttling output mid-cut. Keeping blades sharp reduces motor load, which directly reduces draw on the battery per pass.\u003c\/p\u003e\n  \u003ch3 class=\"bpw-desc-h3\"\u003eMower stops mid-cut but the battery shows charge remaining\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis usually points to a voltage sag under load — the pack's resting voltage reads fine, but cell voltage drops below the BMS cutoff threshold the moment the motor spikes current demand. It happens most often in aging packs with degraded cells. A replacement pack with fresh cells restores the headroom the BMS needs to stay above that cutoff during heavy pulls through dense grass.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43175817117786,"sku":"BWCS-KBT254PW-1","price":108.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43175817150554,"sku":"BWCS-KBT254PW-2","price":127.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43175817183322,"sku":"BWCS-KBT254PW-3","price":141.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KBT254PW-1.webp?v=1775236276","url":"https:\/\/batteryweb.com\/products\/kobalt-16-inch-mower-km-1640-06-replacement-battery-40v-4000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}