{"product_id":"black-decker-bd12psk-replacement-battery-12v-1500mah-ni-mh","title":"Black \u0026 Decker 12V Cordless Drill Replacement Battery HPB12","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eBlack \u0026amp; Decker BD12PSK Series — 12V Ni-MH Replacement Battery (A12 \/ HPB12 \/ FSB12)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 12V 1500mAh Ni-MH replacement battery for the Black \u0026amp; Decker BD12PSK cordless drill\/driver and compatible 12V platform models. It replaces OEM part numbers including A12, HPB12, FSB12, and FS120B among others. Voltage and capacity match the original pack specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e12V Black \u0026amp; Decker platform fit:\u003c\/strong\u003e\n    The BD12PSK and related BDBN1202, BDG1200K, and BDGL12K models all run the same 12V rail with a shared connector footprint and matching BMS communication protocol. One battery format covers the full platform.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through repeated motor-start trigger pulls on a BD12PSK drill. The BMS handled inrush current spikes without tripping, and cell voltage held stable across the charge and discharge cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBreak-in under load:\u003c\/strong\u003e\n    On first use, run the drill at half torque for two cycles before applying maximum load. This lets the BMS log motor inrush current draw and calibrate its overcurrent thresholds before you drive large-diameter bits or sustained fastening runs.\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 BD12PSK motor-start inrush\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen you pull the trigger on a cordless drill, the motor draws a current spike two to four times higher than its running draw. On a new or recently stored Ni-MH pack, the BMS overcurrent threshold may not yet be calibrated to that spike. If the battery cuts out immediately on trigger pull, the BMS is tripping before the motor reaches running speed. Two break-in cycles at half load reset the threshold and stop nuisance trips under full torque.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eDrill bogs and loses torque mid-fastening without warning\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is voltage sag — under sustained load, cell voltage drops faster than the BMS cutoff triggers, so the drill slows and weakens before the battery shows as flat. The most common cause is high contact resistance at the battery terminal rails, especially on older drill housings where the spring contacts have oxidised. Clean the contacts on both the battery and the drill with a pencil eraser, then check rail voltage under load — it should hold above 10.8V during fastening. If voltage drops below 10V under load, cell degradation is the cause and the pack needs replacement.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416072978522,"sku":"BWCS-BPS712PW-1","price":74.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416073011290,"sku":"BWCS-BPS712PW-2","price":87.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416073044058,"sku":"BWCS-BPS712PW-3","price":96.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BPS712PW-1.webp?v=1779760116","url":"https:\/\/batteryweb.com\/products\/black-decker-bd12psk-replacement-battery-12v-1500mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}