{"product_id":"fischer-fss18v-400-bl-set-1-replacement-battery-18v-2000mah-li-ion","title":"Fischer FSS18V 400 BL Compatible Battery 18V 2000mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFischer FSS18V 400 BL Series — 18V Li-ion 2000mAh Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 18V, 2000mAh Li-ion battery fits the Fischer FSS18V 400 BL cordless drill sets (Set 1 through Set 4 and additional variants). It replaces the original pack in the FSS18V 400 BL platform when cell capacity has dropped from repeated charge cycles. Voltage and connector match the original Fischer battery slot directly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFSS18V 400 BL platform fit:\u003c\/strong\u003e\n    All FSS18V 400 BL set variants share the same 18V battery rail, connector pinout, and BMS handshake protocol. One battery type covers the full set range without adaptation.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through trigger-pull load sequences on the FSS18V 400 BL drill. The BMS held stable through repeated motor-start inrush spikes and did not trip during continuous fastening runs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMotor inrush break-in:\u003c\/strong\u003e\n    On first use, run the drill at half load for two cycles before full-torque applications. This lets the BMS log the motor's inrush current signature and set accurate overcurrent thresholds before heavy driving tasks.\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 FSS18V 400 BL motor-start inrush surge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe FSS18V 400 BL brushless motor draws a short, high-current spike the instant the trigger is pulled. On a new or recently stored battery, the BMS has not yet profiled that spike and may apply a conservative overcurrent threshold. If the pack cuts out immediately on trigger pull, the BMS is tripping before it registers the load as normal operating behaviour. Running two half-load cycles teaches the BMS the expected inrush range and raises the protection threshold accordingly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eCharger not recognising the FSS18V pack after storage\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eLi-ion cells left unused for several months can drop below the charger's acceptance voltage — typically around 2.5V per cell. When this happens, the charger does not begin the main charge cycle and may show a blinking or error LED. Place the pack in the charger for 10–15 minutes anyway; many Fischer chargers include a trickle pre-charge mode that recovers cells sitting above approximately 2.0V per cell. If the charger still shows no response after 20 minutes, measure pack voltage at the terminals — a reading below 10V on this 18V pack indicates cells are below recoverable range.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43416015339610,"sku":"BWCS-MTB180VX-1","price":79.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43416015372378,"sku":"BWCS-MTB180VX-2","price":92.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43416015405146,"sku":"BWCS-MTB180VX-3","price":102.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MTB180VX-1.webp?v=1779759486","url":"https:\/\/batteryweb.com\/products\/fischer-fss18v-400-bl-set-1-replacement-battery-18v-2000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}