{"product_id":"fukuda-fx-4100-replacement-battery-96v-3500mah-ni-mh","title":"Fukuda 8TH-2400 Defibrillator Replacement Battery 9.6V 3500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFukuda FX-4100 \/ FCP-4101 Series — 9.6V Ni-MH Replacement Battery (8TH-2400)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9.6V, 3500mAh Ni-MH replacement battery for the Fukuda FX-4100 defibrillator line. It fits the FX-4100, FX-4211, FCP-4101, and FCP-4102 — all units that use the OEM part number 8TH-2400. Capacity matches the original at 33.6Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFX-4100 and FCP series compatibility:\u003c\/strong\u003e\n    These models share the same 9.6V eight-cell Ni-MH architecture and a common BMS handshake protocol. The connector pinout and charge termination signal are identical across the range, so one cell pack covers all listed units without modification.\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 and discharge on a FX-4100 unit. The BMS accepted the cell chemistry, completed charge termination at the correct delta-V threshold, and passed the device self-test without triggering a fault code.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation self-test protocol:\u003c\/strong\u003e\n    After fitting this battery, allow the FX-4100 to complete its full power-on self-test without interruption. The device runs a BMS verification sequence at startup — cutting power mid-cycle writes a false battery fault to memory that persists until a clean reboot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eSelf-test failure after battery swap on the FX-4100\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe FX-4100's BMS stores chemistry calibration data from the previous pack. When a new cell is installed, the BMS has no learned capacity baseline to compare against, so it flags a self-test fault on the first boot. This is not a defective battery. Run one complete charge-discharge cycle and let the device finish its self-test undisturbed on the second boot — the BMS will write new calibration data and the fault clears. Do not place the unit in clinical service until that cycle is complete.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eLow battery alarm triggers immediately after a confirmed full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe FX-4100 alarm threshold is calibrated to OEM cell internal resistance values. A new Ni-MH pack has higher internal resistance than a conditioned cell, which causes the device to read a lower effective voltage under load — even at full charge. The alarm clears after the first three to five full cycles as internal resistance drops to normal operating range. Confirm the pack reaches 10.8V off-load after a full charge before investigating further.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381486125146,"sku":"BWCS-FDX421MD-1","price":78.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381486157914,"sku":"BWCS-FDX421MD-2","price":91.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381486190682,"sku":"BWCS-FDX421MD-3","price":101.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FDX421MD-1.webp?v=1778901171","url":"https:\/\/batteryweb.com\/products\/fukuda-fx-4100-replacement-battery-96v-3500mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}