{"product_id":"vertex-standard-evx-231-replacement-battery-74v-2600mah-li-ion","title":"Vertex Standard EVX-231 Replacement Battery 7.4V 2600mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVertex Standard EVX-231 \/ EVX-530 Series — 7.4V Li-ion Replacement Battery (FNB-V134Li)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 2600mAh Li-ion battery replaces OEM part numbers FNB-V134Li, FNB-V136, FNB-112Li, FNB-113Li, AAJ67X001, and AAJ68X001. It fits the Vertex Standard EVX-231, EVX-261, EVX-530, EVX-531, and eight additional models in the same platform family. Voltage and capacity match OEM spec exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEVX-200 and EVX-500 platform compatibility:\u003c\/strong\u003e\n    These two series share the same 7.4V battery bay, connector pinout, and BMS handshake protocol — which is why one pack covers both. The radio's charge management circuit reads the same pack ID from either series without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack on an EVX-231 and EVX-530 dock. The BMS accepted the handshake on first insertion, charging initiated without fault, and PTT transmit current spikes did not trip the overcurrent threshold across repeated keying cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the dock:\u003c\/strong\u003e\n    If the dock shows a fault LED on first seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Vertex platform requires a clean contact cycle to complete the BMS handshake before charging begins — a single wipe clears most first-insertion rejections.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the EVX-231 cuts out mid-transmission on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe EVX-231 draws a sharp current spike the moment PTT is pressed — RF output at full power can pull 1.5–2A in the first 100ms. If the replacement pack's BMS has a conservative overcurrent trip point, that spike can trigger a momentary cutout before the radio locks onto the channel. This is a BMS threshold issue, not a capacity issue. The fix is to cycle the pack through two or three full charge-discharge sequences so the BMS calibrates its trip point against the radio's actual load profile. After conditioning, the cutouts stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after fitting a new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNew Li-ion cells ship at storage voltage — typically 3.6–3.7V per cell, which puts the pack around 7.2V total. The EVX series maps its bar display against fixed voltage thresholds, so a pack at 7.2V reads one bar low even though the cell is healthy and nearly full. This is not a fault. Place the pack in the charger dock and run a full charge cycle to 8.4V. Once the pack reaches that voltage, the bar indicator will read correctly on the next power-up.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426336702554,"sku":"BWCS-FVX450TW-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426336735322,"sku":"BWCS-FVX450TW-2","price":50.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426336768090,"sku":"BWCS-FVX450TW-3","price":55.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FVX450TW-1.webp?v=1779930720","url":"https:\/\/batteryweb.com\/products\/vertex-standard-evx-231-replacement-battery-74v-2600mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}