{"product_id":"yaesu-evx-530-replacement-battery-74v-3350mah-li-ion","title":"Yaesu EVX-530 Compatible Battery 7.4V 3350mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eYaesu EVX-530 Series — 7.4V Li-ion Replacement Battery (AAJ67X001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V 3350mAh Li-ion battery replaces the AAJ67X001 pack used in Yaesu EVX-530, EVX-531, EVX-534, and EVX-539 digital two-way radios. It slots into the same bay and connects through the same multi-pin contact strip as the original. Capacity is drawn from product data: 3350mAh (24.79Wh).\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eEVX-530 Series compatibility:\u003c\/strong\u003e\n    The EVX-530, EVX-531, EVX-534, and EVX-539 share a common battery bay, contact pin layout, and BMS handshake protocol. All four models run the same 7.4V voltage rail, so one pack covers the full platform 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 transmit loads matching EVX-series RF output draw. The BMS held the voltage rail steady through sustained PTT events and tripped correctly at the low-voltage cutoff threshold without nuisance shutdowns.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the charger dock:\u003c\/strong\u003e\n    If the dock LED shows a fault on initial seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The EVX platform requires a clean contact cycle to complete the BMS handshake before charging begins — this is not a faulty pack.\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-530 cuts out mid-transmission on a new AAJ67X001 pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell ships at storage voltage — typically 3.6–3.7V per cell, not full charge. When PTT is pressed, transmit current spikes sharply. If the pack hasn't completed its first full charge cycle, that spike can pull the cell voltage below the BMS overcurrent threshold, triggering an immediate shutdown. The fix is simple: charge the pack fully before the first field use. After the first complete charge, the BMS calibrates its operating window to the actual cell capacity and transmit spikes are handled without cutoff.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected on a fresh pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe EVX-series radio reads voltage thresholds to drive the bar indicator — it is not a fuel gauge chip. A pack at storage voltage (around 7.2–7.4V resting) sits below the threshold for a full bar display, so the radio shows one bar short even with a brand-new cell inside. This is a voltage-threshold display behaviour, not a capacity defect. Charge the pack to full (8.4V at the terminals) and the indicator will read correctly on next power-on.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426200879194,"sku":"BWCS-FVX451TW-1","price":92.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426200911962,"sku":"BWCS-FVX451TW-2","price":109.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426200944730,"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\/yaesu-evx-530-replacement-battery-74v-3350mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}