{"product_id":"vertex-standard-evx-231-replacement-battery-74v-3350mah-li-ion","title":"Vertex Standard EVX-231 Replacement Battery 7.4V 3350mAh","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 (AAJ67X001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V Li-ion battery replaces OEM part numbers AAJ67X001, AAJ68X001, FNB-112Li, FNB-113Li, FNB-V134Li, and FNB-V136 across the Vertex Standard EVX lineup. It fits the EVX-231, EVX-261, EVX-530, and EVX-531 portable UHF transceivers, plus eight additional models in that family. Capacity is 3350mAh (24.79Wh) — sourced from our product data, not estimated.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEVX-231 \/ EVX-530 platform compatibility:\u003c\/strong\u003e\n    These models share the same battery bay geometry, 7.4V nominal rail, and BMS handshake protocol. One cell pack spans the full EVX portable range without connector or firmware conflict.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through transmit loads on the EVX-531 bench unit. The BMS handled the transmit current spike without tripping overcurrent lockout, and the charger dock accepted the handshake on first insertion.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eContact strip care on first dock insertion:\u003c\/strong\u003e\n    If the charger dock shows a fault LED when you first seat this pack, pull the battery, wipe the gold contact strip with a dry cloth, and reseat firmly. The EVX dock requires a clean contact cycle to complete the BMS handshake before it will begin charging.\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 pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-ion cell ships at storage voltage — typically 3.6–3.7V per cell, not full charge. When you key up on the EVX-231, transmit current spikes sharply. If the cell voltage is already low from storage, that spike can pull the pack below the BMS overcurrent threshold and trigger a momentary cutout. This is not a faulty battery. Charge the pack fully before the first field shift — the dock should show green before you pull it.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator reads one bar fewer than expected on a fresh AAJ67X001 pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe EVX series uses a voltage-threshold bar indicator, not a chip-based fuel gauge. A pack at storage voltage reads lower than a fully charged cell, so the radio displays one fewer bar even though the pack is not depleted. The fix is straightforward: charge the battery to full in the dock before reading the indicator. After a complete charge cycle, the pack should sit at 8.3–8.4V open circuit and the indicator will reflect that correctly.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426200158298,"sku":"BWCS-FVX451TW-1","price":92.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426200191066,"sku":"BWCS-FVX451TW-2","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426200223834,"sku":"BWCS-FVX451TW-3","price":122.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FVX451TW_1.webp?v=1779930436","url":"https:\/\/batteryweb.com\/products\/vertex-standard-evx-231-replacement-battery-74v-3350mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}