{"product_id":"greenworks-40v-12-chainsaw-replacement-battery-40v-3000mah-li-ion","title":"40V 12\" Chainsaw Replacement Battery GWG40B2 3000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eGreenWorks 40V Chainsaw \u0026amp; Pole Saw — 40V Li-ion Replacement Battery\u003c\/h2\u003e\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 40V 3000mAh lithium-ion pack replaces the GWG40B2 and GWG40B4 batteries used in GreenWorks 40V chainsaws and pole saws. It fits the 12\" cordless chainsaw, the 8\" cordless pole saw, and 61 additional 40V platform tools. Capacity is 120Wh at 40V nominal.\u003c\/p\u003e\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePlatform-wide compatibility:\u003c\/strong\u003e All listed models share the same 40V lithium-ion rail, connector housing, and BMS communication protocol — one pack works across every tool in the GreenWorks 40V lineup.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e We ran full charge\/discharge cycles across chainsaw and pole saw loads — the BMS held voltage steady under bar resistance and tripped the low-voltage cutoff cleanly without cell reversal.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge on a new pack:\u003c\/strong\u003e Run a full charge before the first cut. Li-ion cells ship partially discharged for transport safety — topping up first lets the BMS calibrate state-of-charge accurately from the start.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003chr class=\"bpw-desc-divider\"\u003e\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy chain load matters for battery longevity\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA dull or over-tensioned chain draws higher current from the pack on every cut. That sustained overcurrent stresses cells and accelerates capacity loss. Keep the chain sharp and tensioned to GreenWorks spec — the battery lasts longer because the motor isn't fighting extra drag.\u003c\/p\u003e\n  \u003ch3 class=\"bpw-desc-h3\"\u003eChainsaw won't start after sitting — and how to fix it\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the saw refuses to start after the pack has sat unused for weeks, the BMS may have tripped into deep-sleep mode to protect cells at low voltage. Remove the battery, press the charge button on the pack once, then place it on the charger immediately. The charger's trickle stage wakes the BMS and brings the cells back to a normal operating range.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43175811874906,"sku":"BWCS-GWP410PW-1","price":141.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43175811907674,"sku":"BWCS-GWP410PW-2","price":167.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43175811940442,"sku":"BWCS-GWP410PW-3","price":186.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-GWP410PW-1.webp?v=1775236275","url":"https:\/\/batteryweb.com\/products\/greenworks-40v-12-chainsaw-replacement-battery-40v-3000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}