{"product_id":"hyt-pt850-replacement-battery-37v-1800mah-li-ion","title":"HYT PT850 Replacement Battery BL1805 3.7V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHYT PT850 — 3.7V Li-ion Replacement Battery (BL1805)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V, 1800mAh Li-ion replacement battery for the HYT PT850 portable two-way radio. It carries OEM part number BL1805 and fits directly into the PT850 battery bay. Capacity figure is taken from the product specification — 1800mAh, 6.66Wh.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePT850 platform fit:\u003c\/strong\u003e\n    The PT850 uses a single-cell 3.7V Li-ion pack with a multi-pin connector that carries both power and BMS data lines. This replacement matches that connector pinout and voltage rail so the radio's charge-state indicator reads correctly from first insertion.\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 and transmit-load discharge on the PT850 platform. The BMS held stable across the PTT current spike at transmit — no overcurrent trip or unexpected cutoff during the test sequence.\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 on first insertion, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly. The PT850 dock 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 PT850 cuts out mid-transmission on a new BL1805\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new Li-ion cell ships at storage voltage — typically 3.6V to 3.75V — not at full charge. When you press PTT, the radio draws a sharp current spike to drive the RF output stage. If the cell is at storage voltage, that spike can pull the terminal voltage below the BMS cutoff threshold momentarily, causing the radio to drop the transmission. This is not a faulty pack. Charge the battery fully before the first PTT test — the dock should show a solid green before you key up.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePT850 bar indicator showing one fewer bar than expected after fitting BL1805\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe PT850 uses a voltage-threshold bar indicator, not a fuel gauge chip — each bar corresponds to a fixed voltage window. A new cell at storage voltage sits near the lower threshold, so the radio may display one bar even though the pack is not depleted. Place the battery on charge until the dock shows green, then reinsert it. The bar display should step up to full once the cell reaches its rated terminal voltage around 4.1V–4.2V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426325233754,"sku":"BWCS-HTC850TW-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426325266522,"sku":"BWCS-HTC850TW-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426325299290,"sku":"BWCS-HTC850TW-3","price":51.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-HTC850TW-1.webp?v=1779930634","url":"https:\/\/batteryweb.com\/products\/hyt-pt850-replacement-battery-37v-1800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}