{"product_id":"vertex-standard-vx-351-replacement-battery-74v-2200mah-li-ion","title":"Vertex Standard VX-351 Compatible Battery FNB-V130LI 7.4V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVertex Standard VX-351 \/ VX-354 \/ VX-359 — 7.4V Li-ion Replacement Battery (FNB-V130LI)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V 2200mAh lithium-ion battery for the Vertex Standard VX-351, VX-354, and VX-359 handheld transceivers. It replaces OEM part numbers FNB-V130LI and FNB-V130LI-UNI. The pack slots into the same battery bay and connects to the same dock charger contacts as the original.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVX-351, VX-354, VX-359 platform fit:\u003c\/strong\u003e\n    These three models share the same battery bay dimensions, contact layout, and BMS handshake protocol. One pack covers all three — no adapter or firmware change needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through full charge and transmit-load draws on the VX-351. The BMS handled the PTT current spike cleanly and held voltage above the low-battery threshold throughout the test cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the dock:\u003c\/strong\u003e\n    If the charger shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat it firmly. The Vertex platform requires a clean contact cycle 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\"\u003eVX-351 bar indicator showing one fewer bar than expected on a new FNB-V130LI\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNew lithium-ion cells ship at storage voltage — typically around 3.7V per cell, which puts this 7.4V pack below the threshold the VX-351 maps to a full bar reading. The radio's voltage-threshold indicator reads the resting voltage on insertion, not the pack's actual charge state. A single charge cycle brings the pack to full working voltage. After that first full charge, the bar indicator will read correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRadio drops to reduced TX power mid-shift on the VX-354\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSustained RF output pulls significantly more current than standby or receive modes. If cell impedance rises — common in aged or deeply discharged packs — voltage sags under that transmit load and the radio's protection circuit steps down output power to stay within safe operating range. This is not a radio fault; it is the BMS responding to a real voltage drop. Swapping to a freshly charged pack and confirming resting voltage reads at or above 8.0V before the shift will eliminate this mid-shift drop.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426333327450,"sku":"BWCS-FNB13TW-1","price":38.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426333360218,"sku":"BWCS-FNB13TW-2","price":44.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426333392986,"sku":"BWCS-FNB13TW-3","price":48.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FNB13TW-1.webp?v=1779930720","url":"https:\/\/batteryweb.com\/products\/vertex-standard-vx-351-replacement-battery-74v-2200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}