{"product_id":"stanley-fmc625d2-replacement-battery-20v-5000mah-li-ion","title":"Stanley 20V FMC687L Replacement Battery 5000mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eStanley FMC625D2 Series — 20V Li-ion Replacement Battery (FMC687L)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 20V 5000mAh Li-ion battery replaces the FMC687L pack on Stanley FMC625D2, FMC645D2, FMC675B, and compatible 20V platform models. It slots into the same rail connector and communicates with the same BMS handshake as the original. Capacity is 5000mAh (100Wh) — confirmed from product specification, not estimated.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFMC625D2 platform compatibility:\u003c\/strong\u003e\n    These models share Stanley's 20V slide-rail connector and a common BMS communication protocol. The same cell configuration, terminal layout, and voltage rail run across the FMC625D2, FMC645D2, and FMC675B — which is why one pack covers the full lineup 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 the FMC625D2 impact driver through repeated full-torque fastening cycles. The BMS handled motor-start inrush current without tripping, held steady voltage delivery under load, and flagged cell balance correctly on the charger.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMotor inrush conditioning on first use:\u003c\/strong\u003e\n    On first use, run the impact driver at half load for two cycles before maximum torque applications. This allows the BMS to profile the motor's inrush current draw and calibrate overcurrent thresholds before you push the pack hard.\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 FMC625D2 motor-start inrush surge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eImpact drivers pull a sharp current spike the moment the trigger engages — often two to three times the sustained draw. A new or cold pack can have slightly elevated internal resistance, which pushes the voltage drop across the BMS sense resistor above the overcurrent threshold. The BMS interprets this as a fault and cuts output instantly. Letting the pack warm to room temperature and running one light-load cycle before full torque work brings internal resistance down and clears this behaviour.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger blinking red on a new FMC687L pack after storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eIf the charger blinks red and never advances to charge mode, the cells have likely dropped below the charger's acceptance voltage floor — typically around 10V on a 20V pack. Most Stanley chargers will not initiate a full charge cycle on a pack this low as a protection measure. Some chargers include a recovery or \"wake\" mode: check your charger manual for a dedicated recovery sequence. If no recovery mode exists, a bench power supply at 15–16V for five minutes can bring the pack above the acceptance threshold so the charger takes over at full current.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416012423258,"sku":"BWCS-PTC681PH-1","price":104.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416012456026,"sku":"BWCS-PTC681PH-2","price":122.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416012488794,"sku":"BWCS-PTC681PH-3","price":136.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-PTC681PH-1.webp?v=1779759486","url":"https:\/\/batteryweb.com\/products\/stanley-fmc625d2-replacement-battery-20v-5000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}