{"product_id":"vertex-standard-evx-z61-replacement-battery-74v-2200mah-li-ion","title":"Vertex Standard EVX-Z61 Replacement Battery 7.4V 2200mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVertex Standard EVX-Z61 \/ EVX-Z69 — 7.4V Li-ion Replacement Battery (FNB-V143LI)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 2200mAh lithium-ion battery pack built to the FNB-V143LI specification. It fits the Vertex Standard EVX-Z61 and EVX-Z69 portable two-way radios. Voltage and connector match the OEM pack exactly, and the BMS communicates correctly with the radio's charge management circuit.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEVX-Z61 and EVX-Z69 platform compatibility:\u003c\/strong\u003e\n    Both radios share the same 7.4V battery bay, contact geometry, and BMS handshake protocol — one pack covers both units 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 full charge and discharge on the EVX-Z61 platform. The BMS held correct over-current cutoff during simulated PTT transmit spikes and re-engaged cleanly after cooldown.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the charger dock:\u003c\/strong\u003e\n    If the dock LED flashes fault on first seating, remove the pack and wipe the gold contact strip with a dry cloth, then reseat firmly. The Vertex Standard 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\"\u003eBar indicator showing one fewer bar than expected on a new FNB-V143LI\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNew lithium-ion cells ship at storage voltage — typically around 3.6–3.7V per cell, not full charge. The EVX-Z61 reads pack voltage against fixed thresholds to display its bar indicator, so a cell at storage voltage will show one or two bars short of full even though the pack is not faulty. Charge the pack fully in the dock before drawing any conclusion about capacity. After a complete charge cycle, the indicator should read at the top threshold for a 7.4V pack.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eEVX-Z61 cuts out mid-transmission on a new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eWhen PTT is pressed, the radio draws a sharp current spike to drive the RF output stage — this can briefly exceed the BMS overcurrent threshold if the pack is cold or has not yet completed a full charge cycle. The BMS trips the output and the radio drops mid-transmission. Let the pack reach a full charge first, and allow it to reach ambient temperature before use in cold environments. If the cutout persists after a full charge cycle, check that the contact strip is fully seated — a high-resistance contact will amplify the voltage drop under transmit load and trigger the same BMS response.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426312061018,"sku":"BWCS-VTR610TW-1","price":40.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426312093786,"sku":"BWCS-VTR610TW-2","price":47.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426312126554,"sku":"BWCS-VTR610TW-3","price":52.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-VTR610TW_1.webp?v=1779930681","url":"https:\/\/batteryweb.com\/products\/vertex-standard-evx-z61-replacement-battery-74v-2200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}