{"product_id":"vertex-standard-vxd720-replacement-battery-74v-3500mah-li-ion","title":"Vertex Standard VXD720 7.4V Replacement Battery 3500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVertex Standard VXD720 — 7.4V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V 3500mAh Li-ion battery replaces the original pack in the Vertex Standard VXD720 portable two-way radio. It fits the VXD720 used across commercial, industrial, and public safety communications. Voltage and capacity match the OEM specification exactly.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVXD720 fit:\u003c\/strong\u003e\n    The VXD720 uses a 7.4V two-cell Li-ion architecture with a BMS handshake that must be completed at the charger dock before the charge cycle begins. This pack carries the correct contact layout and BMS profile to complete that handshake without triggering a fault LED.\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-discharge sequences and monitored the BMS under sustained PTT load. The overcurrent protection tripped correctly at the expected threshold and reset cleanly — no latched lockout on normal transmit current draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion on the VXD720 dock:\u003c\/strong\u003e\n    If the dock shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The VXD720 platform requires a clean contact cycle to complete the BMS handshake before charging will begin.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the VXD720 cuts out mid-transmission on a new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-ion cell ships at storage voltage — typically around 3.7V per cell, not the full 4.2V. Under the high current draw of a PTT transmit event, a cell at storage voltage can sag below the BMS low-voltage cutoff threshold momentarily. The radio interprets this as a depleted pack and cuts transmission. A full charge cycle before first heavy use brings both cells to 4.2V each and eliminates this sag.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eVXD720 bar indicator showing one fewer bar than expected on a fresh pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe VXD720 reads battery level using voltage thresholds, not a fuel gauge chip. A new pack at storage voltage sits in a lower threshold band than a fully charged one, so the indicator shows fewer bars than the actual cell condition warrants. This is not a fault with the pack. Charge the battery fully — both cells to 4.2V — and the bar indicator will reflect the correct state.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426195243098,"sku":"BWCS-MDR300TW-1","price":100.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426195275866,"sku":"BWCS-MDR300TW-2","price":119.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426195308634,"sku":"BWCS-MDR300TW-3","price":133.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MDR300TW-1.webp?v=1779930437","url":"https:\/\/batteryweb.com\/products\/vertex-standard-vxd720-replacement-battery-74v-3500mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}