{"product_id":"fluke-fiberinspector-mini-replacement-battery-72v-700mah-ni-mh","title":"Fluke FiberInspector Mini NFM120 Replacement Battery 7.2V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eFluke FiberInspector Mini \/ FT500 — 7.2V Ni-MH Replacement Battery (NFM120)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.2V, 700mAh Ni-MH replacement for the Fluke NFM120 battery pack. It fits the FiberInspector Mini and FT500 fiber optic inspection microscopes. These are field instruments used to examine fiber end-faces for contamination, cracks, and physical defects that degrade signal quality.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFiberInspector Mini and FT500 compatibility:\u003c\/strong\u003e\n    Both instruments share the same battery bay geometry, connector pinout, and 7.2V Ni-MH power rail. The BMS handshake on each model reads cell voltage and thermistor data from the same register set, so one pack covers both.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the FiberInspector Mini's illumination and image-capture sequence. The BMS held stable through repeated tip-module power-up events — no tripped cutoff, no voltage sag on the display refresh cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-use calibration before field deployment:\u003c\/strong\u003e\n    After installing this pack, run a full calibration cycle through the instrument menu before taking it on-site. The FiberInspector Mini maps battery state during calibration. Skip this step and the low-battery warning triggers early during the first real inspection session.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBMS cutoff when the fiber tip module initialises\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen the FiberInspector Mini powers on, the tip module draws a short current spike to energise the LED illumination array and autofocus circuit. On a depleted or cold Ni-MH cell, this spike can pull voltage below the BMS cutoff threshold — roughly 5.4V at pack level — triggering an immediate shutdown. This looks like a dead battery even if the charge indicator showed partial capacity seconds before. Warm the instrument to room temperature and charge the pack fully before the first field session to keep the cells above that trip point.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePack will not charge after months sitting unused in a carry case\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells self-discharge during storage. If the FiberInspector Mini sat unused for several months, the pack voltage can drop below the charger's detection threshold — typically around 1.0V per cell — and the charger simply does not respond. The cells are not dead; the BMS has entered a low-voltage sleep state. Connect the instrument to the charger, wait 10–15 minutes for the trickle stage to bring cells above 1.0V per cell, and normal charge will resume. If the charge LED never activates after 20 minutes, disconnect and reconnect to force a fresh detection cycle.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43360722157658,"sku":"BWCS-FKT500SL-1","price":30.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43360722190426,"sku":"BWCS-FKT500SL-2","price":35.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43360722223194,"sku":"BWCS-FKT500SL-3","price":38.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FKT500SL-1.webp?v=1778616209","url":"https:\/\/batteryweb.com\/products\/fluke-fiberinspector-mini-replacement-battery-72v-700mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}