{"product_id":"firestorm-bd14psk-replacement-battery-144v-2000mah-ni-mh","title":"Firestorm FS140BX 14.4V Ni-MH Replacement Battery 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFirestorm BD14PSK Series — 14.4V Ni-MH Replacement Battery (FS140BX)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.4V, 2000mAh Ni-MH battery pack built to replace the FS140BX in Firestorm cordless drill-drivers. It fits the BD14PSK, FS1400D, FS1400D-2, FS1402D, and over 35 additional models in the same voltage family. If your original pack no longer holds a charge under drilling or driving loads, this is the direct swap.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBD14PSK and FS1400D family fit:\u003c\/strong\u003e\n    These models share a 14.4V rail, the same slide-in connector geometry, and compatible BMS handshake signals. One battery pack covers the full range without adapter modifications or firmware changes.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through full charge-discharge loops on a BD14PSK and monitored BMS response during motor-start inrush. Cell balancing held across all cycles and the overcurrent threshold did not trip under standard trigger-pull loads.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBreak-in load cycling for Ni-MH cells:\u003c\/strong\u003e\n    Run the drill at half load for the first two full cycles before applying maximum torque. Ni-MH cells need a few charge-discharge passes to reach rated capacity — skipping this shortens the usable capacity you get from the pack long-term.\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 during trigger pull\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen you pull the trigger on a cordless drill, the motor draws a spike of current before it reaches running speed. On Ni-MH packs, this inrush can exceed the BMS overcurrent threshold if the cells are cold or partially discharged. The BMS interprets that spike as a fault and cuts power before the motor finishes starting. Letting the pack warm to room temperature and ensuring it is charged above 12V before use keeps the inrush spike within the threshold window.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTool bogs under load but does not cut out\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the drill slows under torque but keeps running, the issue is voltage sag — not a BMS trip. High contact resistance at the battery rail connectors causes a voltage drop under load, which starves the motor. Clean the pack contacts and tool terminals with a dry cloth or fine abrasive, then reseat the pack firmly. If the sag continues after cleaning, check the resting voltage at the pack terminals — a healthy 14.4V Ni-MH pack should read 15.6–16.8V immediately after a full charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416079761498,"sku":"BWCS-BPS142PW-1","price":84.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416079794266,"sku":"BWCS-BPS142PW-2","price":98.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416079827034,"sku":"BWCS-BPS142PW-3","price":109.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BPS142PW-1.webp?v=1779760117","url":"https:\/\/batteryweb.com\/products\/firestorm-bd14psk-replacement-battery-144v-2000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}