{"product_id":"yaesu-ft-817-replacement-battery-96v-1500mah-ni-mh","title":"Yaesu FNB-72 FT-817 Replacement Battery 9.6V 1500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eYaesu FT-817 \/ FT-818 Series — 9.6V Ni-MH Replacement Battery (FNB-85)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9.6V, 1500mAh Ni-MH battery pack for the Yaesu FT-817, FT-817ND, and FT-818 portable HF\/VHF\/UHF transceivers. It replaces OEM part numbers FNB-72, FNB-85, and SBR-32MH. The pack slots into the same battery compartment as the original and connects via the same spring-contact rail.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFT-817 and FT-818 compatibility:\u003c\/strong\u003e\n    Both radios share the same battery bay dimensions, spring-contact layout, and 9.6V nominal voltage rail. A single pack covers the full FT-817 and FT-818 lineup 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 transmit loads on the FT-817 bench rig. The cells held voltage above the radio's low-battery cutoff through repeated PTT bursts, and the BMS did not trip under the brief transmit current spike at full 5W output.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eNi-MH cycle conditioning on the FT-817:\u003c\/strong\u003e\n    New Ni-MH cells ship at partial charge. Run two or three full discharge-charge cycles using the radio's normal receive-transmit operation before relying on the pack for field use — Ni-MH chemistry reaches rated capacity after break-in, not at first charge.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the FT-817 drops to 2.5W mid-transmission on a new pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe FT-817 monitors rail voltage continuously and steps RF output down from 5W to 2.5W when voltage sags below roughly 8.5V under load. A new or unconditioned Ni-MH pack has not yet reached full cell capacity, so internal resistance is higher than a broken-in pack. Under sustained PTT, that resistance causes a voltage sag that crosses the radio's threshold and triggers the power step-down. Two to three full discharge-charge cycles lower cell impedance and restore stable voltage under transmit load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after inserting a new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe FT-817 uses a simple voltage-threshold bar indicator — it maps resting pack voltage directly to bar count. A new Ni-MH pack ships at storage voltage, typically around 9.0–9.2V, which sits one threshold below a fully charged pack at 9.6V. This is not a faulty cell. Charge the pack fully using the NC-72B or NC-88B dock before first use, and the bar indicator will read correctly once the pack reaches full resting voltage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426366160986,"sku":"BWCS-FNB85TW-1","price":57.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426366193754,"sku":"BWCS-FNB85TW-2","price":66.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426366226522,"sku":"BWCS-FNB85TW-3","price":72.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FNB85TW-1.webp?v=1779930808","url":"https:\/\/batteryweb.com\/products\/yaesu-ft-817-replacement-battery-96v-1500mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}