{"product_id":"hytera-pt850-replacement-battery-37v-1800mah-li-ion","title":"Hytera PT850 Two-Way Radio Replacement Battery BL1805 3.7V 1800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHytera PT850 — 3.7V Li-ion Replacement Battery (BL1805)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThe BL1805 is a 3.7V, 1800mAh lithium-ion battery for the Hytera PT850 portable two-way radio. It slots directly into the PT850 battery bay and pairs with the radio's charging dock and BMS handshake protocol. Capacity figure is taken from product data — 6.66Wh total energy.\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 runs a single-cell 3.7V architecture. This battery matches that voltage rail and uses the same contact configuration and BMS signalling the radio expects. No adapter or modification needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through PTT transmit loads on the PT850 bench unit. The BMS held cutoff at the correct low-voltage threshold and recovered cleanly from a transmit current spike without tripping into lockout.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-insertion dock behaviour:\u003c\/strong\u003e\n    If the charging dock shows a fault LED on the first seating, 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 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 PT850 drops to reduced TX power mid-shift on a new BL1805\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new lithium-ion cell ships at storage voltage — typically 3.6V to 3.7V — not at a full charge state. Under sustained RF output, the PT850 monitors the supply rail and steps down transmit power when voltage sags below its threshold. This is not a faulty battery. Running one full charge cycle through the dock before field use brings the cell to its rated capacity and stabilises the voltage rail under TX load.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing fewer bars than expected after inserting the BL1805\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe PT850 uses a voltage-threshold bar indicator, not a fuel gauge chip. A new cell at storage voltage reads as partially charged, so the radio displays two or three bars instead of four. This is a voltage reading, not a capacity fault. Charge the battery fully in the dock — the indicator will read correctly once the cell reaches 4.1V to 4.2V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426325102682,"sku":"BWCS-HTC850TW-1","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426325135450,"sku":"BWCS-HTC850TW-2","price":46.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426325168218,"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\/hytera-pt850-replacement-battery-37v-1800mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}