{"product_id":"wurth-master-sd-144-replacement-battery-144v-5000mah-li-ion","title":"Würth Master SD 14.4 Replacement Battery 14.4V 5000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eWurth Master SD 14.4 — 14.4V Li-ion Replacement Battery (0700980420)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.4V, 5000mAh (72Wh) Li-ion battery for the Wurth Master SD 14.4 cordless drill\/driver. It replaces OEM part numbers 0700980420 and 0700980425. Use it for fastening, drilling, and general construction work where the original pack has degraded or you need a second battery on site.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaster SD 14.4 platform fit:\u003c\/strong\u003e\n    The Master SD 14.4 uses a 14.4V rail with a specific BMS handshake that verifies cell voltage and pack temperature before allowing motor drive. This battery meets that handshake — the charger and tool both recognise the pack without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through repeated trigger-pull inrush loads on the Master SD 14.4 platform. The BMS handled the motor-start current spike without tripping overcurrent protection, and cell voltage recovered cleanly between draws.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBreak-in procedure for drill use:\u003c\/strong\u003e\n    On first use, run the drill at half load for two cycles before applying maximum torque. This allows the BMS to profile the motor inrush current draw and set overcurrent thresholds accurately before you hit hard fastening applications.\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 motor-start inrush surge in the Master SD 14.4\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eWhen you pull the trigger on a cordless drill, the motor draws a short, sharp inrush current — often three to five times the steady running current. The BMS monitors this spike and cuts power if it exceeds the overcurrent threshold. On a new or cold pack, the BMS threshold may be conservative until it has profiled a few cycles. If the tool cuts out immediately on trigger pull, the BMS is tripping on that inrush spike rather than a fault with the cells themselves. Two or three partial-load cycles recalibrate the threshold and resolve the cutout.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTool bogs under load and torque drops off mid-fastening\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the Master SD 14.4 loses torque while driving a fastener, the most common cause is voltage sag from high contact resistance at the battery rail. Clean the battery contacts and tool terminals with isopropyl alcohol — oxidation on the copper pads adds resistance and drops the voltage under load. A healthy pack should hold above 13.0V under moderate drill load. If cleaned contacts don't fix the sag, check that the pack is fully charged before condemning it — a partially discharged Li-ion pack will sag harder under load than a full one.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416039981146,"sku":"BWCS-ABM143PX-1","price":106.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416040013914,"sku":"BWCS-ABM143PX-2","price":125.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416040046682,"sku":"BWCS-ABM143PX-3","price":139.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ABM143PX-1.webp?v=1779759665","url":"https:\/\/batteryweb.com\/products\/wurth-master-sd-144-replacement-battery-144v-5000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}