{"product_id":"firestorm-bd14psk-replacement-battery-144v-2100mah-ni-mh","title":"Firestorm A18 14.4V Drill Battery Replacement 2100mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFirestorm BD14PSK Series — 14.4V Ni-MH Replacement Battery (A18)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 14.4V 2100mAh Ni-MH battery for the Firestorm BD14PSK drill\/driver and compatible models in the FS1200D, FS1202BN, and related series. It replaces OEM part numbers A18, FSB18, FS18BX, and FS140BX among others. Slot it into any charger dock that accepted the original pack.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBD14PSK and FS-series compatibility:\u003c\/strong\u003e\n    These models share the same 14.4V rail, slide-pack connector orientation, and contact pin layout. The BMS on each tool reads cell voltage through the same three-terminal handshake, so one pack covers the full compatibility list without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack on a BD14PSK through repeated trigger-pull cycles at full torque load. The BMS held its overcurrent threshold without nuisance tripping, and cell voltage recovery between pulls stayed within the expected Ni-MH profile.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-cycle conditioning on the BD14PSK:\u003c\/strong\u003e\n    Run the drill at half load for two full discharge-and-charge cycles before driving at maximum torque. This lets the BMS profile the motor's inrush current draw and calibrate its overcurrent protection threshold to your specific tool's draw signature.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS overcurrent trip on BD14PSK motor-start inrush\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen you pull the trigger on a BD14PSK, the motor draws a brief inrush spike — often two to three times the steady-state current — before the armature starts spinning. A new Ni-MH pack that hasn't been conditioned may have its BMS overcurrent threshold set conservatively from the factory. That threshold can cause the pack to cut out at the spike rather than sustaining it. Running two half-load cycles first lets the BMS log the inrush signature and widen its trip window accordingly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDrill bogs under load but shows green on the charger\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe charger reads resting cell voltage, not loaded voltage. A pack can sit at 14.4V at rest and sag to 11V or lower the moment the motor pulls current under a fastening load. On Ni-MH packs, this voltage sag usually means elevated internal resistance from repeated shallow cycling — topping up the pack after light use rather than running it down. To recover, run the pack to full discharge under moderate load, then charge to completion. If sag persists past two full cycles, check the slide-pack contact rails on the tool for oxidation and clean with isopropyl alcohol before concluding the cells are at fault.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416045715546,"sku":"BWCS-BPS140PW-1","price":92.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416045748314,"sku":"BWCS-BPS140PW-2","price":108.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416045781082,"sku":"BWCS-BPS140PW-3","price":120.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BPS140PW-1.webp?v=1779759665","url":"https:\/\/batteryweb.com\/products\/firestorm-bd14psk-replacement-battery-144v-2100mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}