{"product_id":"vertex-standard-ft-60-replacement-battery-74v-2600mah-li-ion","title":"Vertex Standard FT-60 Replacement Battery FNB-57 7.4V 2600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVertex Standard FT-60 \/ FT-60R Series — 7.4V Li-ion Replacement Battery (FNB-83)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 2600mAh Li-ion battery for the Vertex Standard FT-60 and FT-60R handheld two-way radios. It also fits the broader FT-60 platform including FT60 and FT60R variants. Cross-references multiple OEM part numbers: FNB-57, FNB-64, FNB-64H, FNB-83, FNB-83H, FNB-V57, FNB-V57H, FNB-V67Li, FNB-V83, and FNB-V94.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFT-60 platform compatibility:\u003c\/strong\u003e\n    The FT-60 and FT-60R share the same battery bay geometry, contact layout, and 7.4V supply rail. All listed OEM part numbers use the same connector and BMS handshake profile, which is why a single cell pack covers the full range.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through the FT-60's charge dock and PTT transmit cycle. The BMS handled the transmit current spike without tripping, and the charger dock accepted the handshake on first insertion, cycling to green charge status normally.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion contact cycle:\u003c\/strong\u003e\n    If the charger dock shows a fault LED after installing this battery, remove it, wipe the gold contact strip with a dry cloth, and reseat firmly. The FT-60 dock requires a clean contact surface to complete the BMS handshake before charging begins.\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-60 cuts out mid-transmission on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe FT-60 draws a sharp current spike the moment PTT is pressed, as the PA stage ramps to full RF output. If the battery's BMS reads that spike as an overcurrent event, it trips and briefly disconnects the cell, killing transmission. This is more common when a new pack comes off the shelf at storage voltage — typically around 3.7V per cell — rather than a full charge. A full charge cycle before first field use brings cell voltage above the BMS overcurrent threshold and eliminates the trip on transmit.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe FT-60 reads battery level using simple voltage thresholds, not a fuel gauge chip. A new pack shipped at storage voltage will sit at approximately 7.4V resting, which maps to the middle bar segment — not full. This is not a fault with the battery. Charge the pack to completion in the dock; once cell voltage reaches roughly 8.2–8.3V fully charged, the indicator will step up to the expected level.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426336997466,"sku":"BWCS-FNB83TW-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426337030234,"sku":"BWCS-FNB83TW-2","price":44.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426337063002,"sku":"BWCS-FNB83TW-3","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FNB83TW-1.webp?v=1779930720","url":"https:\/\/batteryweb.com\/products\/vertex-standard-ft-60-replacement-battery-74v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}