{"product_id":"fukuda-fx-7540-replacement-battery-96v-3800mah-ni-mh","title":"Fukuda FX-7540 Defibrillator Replacement Battery 9.6V 3800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFukuda FX-7540 \/ FCP-7541 \/ FX-7542 — 9.6V Ni-MH Replacement Battery (T8HR4\/3FAUC-5887)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 9.6V 3800mAh Ni-MH battery replaces the OEM pack in the Fukuda FX-7540, FCP-7541, and FX-7542 semi-automatic external defibrillators. It matches the original voltage rail and connector spec required by the device's power management circuit. Capacity is 3800mAh (36.48Wh) as rated by the manufacturer.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFX-7540 \/ FCP-7541 \/ FX-7542 platform:\u003c\/strong\u003e\n    All three models share the same 9.6V Ni-MH pack format, connector pinout, and BMS handshake protocol — one part number covers the full series 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 charge and discharge under the defibrillator's standard load profile. The BMS completed its handshake on the first power-on and flagged no fault codes during the device's internal verification sequence.\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-7540 to complete its full power-on self-test without interrupting the cycle. The device runs a BMS chemistry verification at startup — cutting power mid-sequence triggers a persistent battery fault that won't clear until the next clean reboot.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the FX-7540 Self-Test Fails After a Battery Swap\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe FX-7540 runs a BMS learn cycle on first power-up with a new pack. If the battery hasn't completed one full charge-discharge cycle before clinical use, the BMS may not yet have mapped the cell's internal resistance profile. This can cause the device to log a self-test failure even when the pack is fully charged. Run one complete charge-discharge cycle before placing this unit back into service — this allows the BMS to calibrate against the actual cell characteristics of the new pack.\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\"\u003eThis happens because the FX-7540's charge IC sets a conservative voltage acceptance threshold calibrated to aged OEM cells. A fresh Ni-MH pack has a slightly different charge curve, and the device may interpret the new cell's terminal voltage as below threshold on the first cycle. The fix is straightforward: run a full charge-discharge cycle using the device's own charger, then recharge to 100%. After that conditioning cycle, the charge IC recalibrates and the alarm clears on subsequent power-on checks.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43381465415770,"sku":"BWCS-FDX754MD-1","price":92.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43381465448538,"sku":"BWCS-FDX754MD-2","price":105.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43381465481306,"sku":"BWCS-FDX754MD-3","price":115.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FDX754MD-1.webp?v=1778900983","url":"https:\/\/batteryweb.com\/products\/fukuda-fx-7540-replacement-battery-96v-3800mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}