{"product_id":"exfo-ftb-4-replacement-battery-72v-6600mah-li-ion","title":"EXFO FTB-4 Replacement Battery NF2047HD 7.2V 6600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEXFO FTB-4 — 7.2V Li-ion Replacement Battery (NF2047HD)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.2V 6600mAh Li-ion battery for the EXFO FTB-4 modular optical test platform. It fits the FTB-4 chassis used for fiber optic network diagnostics, installation verification, and field survey work. OEM part numbers covered: NF2047HD, NF2047HD29, NF2047HD34, and NF2047QE34.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFTB-4 platform compatibility:\u003c\/strong\u003e\n    The FTB-4 accepts interchangeable test modules — OTDR, optical power meter, and inspection probes. Each module draws differently from the same battery bus. This pack matches the voltage rail and connector pinout the FTB-4 BMS expects, so module switching does not trigger a protection event.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran the pack through FTB-4 module initialisation sequences, including OTDR laser warm-up and probe power-on cycles. The BMS held steady through each current spike at module activation and did not trip into protection mode during sustained logging.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePre-deployment calibration cycle:\u003c\/strong\u003e\n    After fitting this battery, run a full calibration cycle through the FTB-4 instrument menu before heading to site. The platform maps battery state during calibration — skipping this step causes premature low-battery warnings during your first measurement session, even with a full charge.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS cutoff during OTDR or probe module power-up on the FTB-4\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the FTB-4 initialises a test module, the inrush current at power-up can briefly exceed what an aged or depleted cell can supply without a voltage sag. If the pack voltage dips below the BMS protection threshold during that spike, the battery cuts out entirely. This is more common with OTDR modules, which pull a sharp current burst during laser warm-up. A fresh pack at full charge handles this spike without the sag — if the unit cuts out on module load, charge the battery to full before re-seating it.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFTB-4 showing erratic battery percentage at reboot after pack swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAfter fitting a new pack, the FTB-4 may display an inconsistent charge percentage — jumping between values or reading lower than expected across the first few power cycles. The instrument's voltage-threshold indicator is recalibrating to the new cell's discharge curve and has not yet built a complete state-of-charge map. Run the battery through one full charge-to-discharge cycle in the field, then recharge fully. By the second full cycle, the percentage display stabilises and tracks accurately to actual cell voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43303968243802,"sku":"BWCS-EFT400SL-1","price":276.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43303968276570,"sku":"BWCS-EFT400SL-2","price":330.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43303968309338,"sku":"BWCS-EFT400SL-3","price":371.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EFT400SL_1.webp?v=1777520716","url":"https:\/\/batteryweb.com\/products\/exfo-ftb-4-replacement-battery-72v-6600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}