{"product_id":"exfo-ftb-2-replacement-battery-144v-6400mah-li-ion","title":"EXFO FTB-2 Replacement Battery XW-EX011 14.4V 6400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEXFO FTB-2 \/ FTB-2-PRO Series — 14.4V Li-ion Replacement Battery (XW-EX011)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 14.4V 6400mAh Li-ion battery replaces the OEM pack in the EXFO FTB-2, FTB-2-PRO, FTB-500, FTB-1v2-PRO-HPDC, and related FTB platform units. The FTB series are modular fiber optic test platforms used for optical power measurement, OTDR testing, and loss analysis in the field. This pack restores portable operation when the original cell no longer holds charge through a full measurement session.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFTB platform compatibility:\u003c\/strong\u003e\n    The FTB-2, FTB-2-PRO, FTB-500, and FTB-1v2-PRO-HPDC share the same 14.4V battery bay, connector pinout, and BMS communication protocol. Swapping between these models does not require any hardware modification — the pack seats and handshakes identically across the platform.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through full charge-discharge cycles on FTB-series hardware. The BMS negotiated correctly with the instrument's power management circuit, held voltage through simulated OTDR module load, and did not trip on module initialisation current draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-install calibration cycle:\u003c\/strong\u003e\n    After fitting this pack, run a full calibration cycle through the FTB instrument menu before heading to a job site. The FTB maps battery state during that calibration pass — skipping it causes the instrument to report premature low-battery warnings during the first measurement session in the field.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFTB-2 voltage dropout under sustained OTDR module load\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eOTDR and optical modules draw sustained current during an acquisition sweep — more than the FTB-2's standby draw by a significant margin. An aged or depleted cell cannot hold the 14.4V rail steady under that load, and the instrument's internal regulator interprets the sag as a low-battery condition. The result is an abrupt shutdown mid-sweep, even when the indicator showed adequate charge moments before. This pack's cells are spec'd to hold the voltage rail through the module's full acquisition window without triggering that cutoff threshold.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eFTB battery percentage jumping or resetting at each reboot\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen a new pack is installed, the FTB's battery indicator is still calibrated against the old cell's discharge curve. This causes the percentage readout to jump, reset, or show wildly inconsistent values across the first several power cycles. The fix is to run the instrument's battery calibration routine found in the system settings menu — not just a single charge cycle. After one full calibration pass, the indicator stabilises and tracks accurately against the new cell's actual charge state.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360686473306,"sku":"BWCS-EFT200SL-1","price":281.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360686506074,"sku":"BWCS-EFT200SL-2","price":335.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360686538842,"sku":"BWCS-EFT200SL-3","price":376.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EFT200SL-1.webp?v=1778616161","url":"https:\/\/batteryweb.com\/products\/exfo-ftb-2-replacement-battery-144v-6400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}