{"product_id":"dynascan-ad-09-replacement-battery-37v-1050mah-li-ion","title":"Dynascan AD-09 Compatible Battery 3.7V 1050mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eDynascan AD-09 — 3.7V Li-ion 1050mAh Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V lithium-ion battery rated at 1050mAh (3.89Wh), built to replace the original pack in the Dynascan AD-09 handheld two-way radio. The AD-09 is a compact UHF radio used across personal and light professional communications. No OEM part number is published for this pack — the fit is confirmed by voltage, physical dimensions (53.20 × 35.30 × 7.10mm), and connector alignment.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eAD-09 fit confirmation:\u003c\/strong\u003e\n    The AD-09 runs a single-cell 3.7V architecture with a compact chassis. This pack matches that voltage rail and sits within the original battery cavity without modification. The BMS communicates directly with the radio's charge circuit on insertion.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge and discharge on the AD-09 platform. The BMS handled transmit current spikes without tripping into overcurrent lockout, and the charger dock accepted the pack cleanly after a full contact cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion contact check:\u003c\/strong\u003e\n    If the charger dock shows a fault LED on first insertion, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly. The AD-09 charger 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\"\u003eWhy the AD-09 cuts out mid-transmission on a new battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNew lithium-ion cells ship at storage voltage — typically 3.6V to 3.7V, not a full 4.2V charge. When you key the PTT on an AD-09, the transmit current draw spikes sharply. If the cell is at storage voltage, that spike can pull the terminal voltage below the BMS overcurrent threshold, triggering a momentary cutout. This is not a faulty pack. Charge the battery fully before the first transmission cycle and the cutout will not recur.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAD-09 bar indicator showing one fewer bar than expected after swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe AD-09 uses a simple voltage-threshold bar display — each bar corresponds to a voltage band, not a calibrated capacity reading. A new pack at storage voltage reads one bar lower than a fully charged pack, which is accurate, not a fault. After a complete first charge to 4.2V, the bar indicator will reflect the correct state. If it still reads low after a full charge, check that the gold contacts on both the battery and the dock are clean and making firm contact.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426367209562,"sku":"BWCS-FNB82TW-1","price":22.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426367242330,"sku":"BWCS-FNB82TW-2","price":25.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426367275098,"sku":"BWCS-FNB82TW-3","price":27.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FNB82TW-1.webp?v=1779930808","url":"https:\/\/batteryweb.com\/products\/dynascan-ad-09-replacement-battery-37v-1050mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}