{"product_id":"yaesu-ft-10-replacement-battery-96v-1000mah-ni-mh","title":"Yaesu FNB-41 9.6V Ni-MH Replacement Battery FT-10","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eYaesu FT-10 \/ FT-40 Series — 9.6V Ni-MH Replacement Battery (FNB-41 \/ FNB-42)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 9.6V, 1000mAh nickel-metal hydride battery pack for the Yaesu FT-10, FT-10R, FT-40, and FT-40R handheld VHF transceivers. It cross-references OEM part numbers FNB-41 and FNB-42. Voltage and cell count match the original pack exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFT-10 and FT-40 platform fit:\u003c\/strong\u003e\n    Both the FT-10 series and FT-40 series run an 8-cell Ni-MH stack at 9.6V nominal. They share the same battery bay dimensions, connector pinout, and charge termination logic — which is why one pack covers both lines.\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 transmit loads on the FT-10R. The BMS accepted charge termination correctly at peak voltage delta, and TX draw during sustained PTT did not trip an overcurrent cutoff.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-insertion contact check on the Yaesu charger dock:\u003c\/strong\u003e\n    If the dock shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The charger requires a clean contact cycle to read the pack voltage and begin the charge sequence.\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-10 cuts out mid-transmission on a fresh Ni-MH pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH cells ship at partial storage voltage — typically 1.0–1.1V per cell, which puts an 8-cell pack around 8.0–8.8V open circuit. The FT-10's TX stage pulls significantly more current than RX standby, and if the cell voltage is low enough, the voltage rail sags under that load and trips the radio's low-voltage cutoff. This is not a fault with the pack. Run one full charge cycle before the first transmit session and the cells will stabilise at their rated 1.2V per cell under load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after installing a new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe FT-10 uses a simple voltage-threshold bar indicator — each bar corresponds to a voltage window, not a fuel gauge reading. A new Ni-MH pack at storage voltage reads lower than a fully charged pack, so the radio displays fewer bars even though the pack is not depleted. This is not a capacity defect. Charge the pack fully and allow it to rest for 15 minutes before reinserting — open-circuit voltage should read 10.5V or above on a charged 9.6V Ni-MH pack, and the bar display will reflect that correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426348630106,"sku":"BWCS-FNB41TW-1","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426348662874,"sku":"BWCS-FNB41TW-2","price":60.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426348695642,"sku":"BWCS-FNB41TW-3","price":66.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FNB41TW-1.webp?v=1779930719","url":"https:\/\/batteryweb.com\/products\/yaesu-ft-10-replacement-battery-96v-1000mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}