{"product_id":"tetra-sc20-replacement-battery-74v-1880mah-li-polymer","title":"TETRA SC20 Compatible Battery 7.4V 1880mAh Li-Polymer","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTETRA SC20 \/ STP9000 Series — 7.4V Li-Polymer Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 1880mAh lithium-polymer battery fits the TETRA SC20 and STP9000 series two-way radios, including the STP9040 and STP9200. It covers sixteen additional models that share the same voltage rail and battery bay format. Capacity is 13.91Wh, matching the original pack specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSC20 and STP9000 platform fit:\u003c\/strong\u003e\n    These models share a common 7.4V nominal rail and identical battery bay dimensions. The BMS handshake protocol is consistent across the series, so one pack covers the full lineup 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 full charge and discharge on the SC20 platform. The BMS held stable through transmit current spikes without tripping overcurrent protection, and the charger dock accepted the handshake on first insertion.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eContact strip care on first dock insertion:\u003c\/strong\u003e\n    If the charger shows a fault LED on first seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The TETRA dock requires a clean contact surface 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 SC20 cuts out mid-transmission on a freshly inserted pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNew lithium-polymer cells ship at storage voltage — typically 3.7V to 3.8V per cell, not the 4.2V full-charge peak. When you key up on the SC20, transmit current can exceed 1.5A. At storage voltage, the BMS sees that draw against a lower state of charge and may trigger a temporary overcurrent cutoff. The radio goes quiet mid-transmission even though the battery is new. Charge the pack fully before first use — the cutout stops once both cells are at or above 4.1V per cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after a full charge cycle\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe STP9000 and SC20 series use a simple voltage-threshold bar display — each bar corresponds to a voltage band, not a percentage from a fuel gauge chip. A new cell can read one bar short if the resting voltage hasn't stabilised after the first charge. Let the pack rest off the charger for 15 minutes before powering on the radio. At that point, open-circuit voltage should settle above 8.2V and the indicator will reflect the correct charge state.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426351153242,"sku":"BWCS-SPR800TW-1","price":50.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426351186010,"sku":"BWCS-SPR800TW-2","price":59.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426351218778,"sku":"BWCS-SPR800TW-3","price":65.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-SPR800TW-1.webp?v=1779930881","url":"https:\/\/batteryweb.com\/products\/tetra-sc20-replacement-battery-74v-1880mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}