{"product_id":"smartcom-sc-280-replacement-battery-74v-2050mah-li-ion","title":"Smartcom SC-280 Compatible Battery 7.4V 2050mAh Li-ion","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eSmartcom SC-280 \/ SC-380 — 7.4V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V 2050mAh Li-ion battery replaces the original pack in the Smartcom SC-280 and SC-380 portable two-way radios. Both models share the same battery bay dimensions, connector pinout, and BMS handshake protocol, so one pack covers both units. Capacity is 2050mAh (15.17Wh) — use that figure for any power budget calculations, not web sources.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSC-280 and SC-380 shared platform:\u003c\/strong\u003e\n    Both radios run the same 7.4V voltage rail, use an identical multi-pin battery connector, and expect the same BMS communication cycle at power-on. The shared footprint — 113.60 × 55.10 × 17.90mm — means one SKU fits either unit without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through full charge-discharge cycles on the SC-280 dock and confirmed the BMS handshake completes correctly. The protection circuit tripped cleanly at the expected overcurrent threshold when we simulated a PTT transmit spike, then reset without requiring manual intervention.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the dock:\u003c\/strong\u003e\n    If the charger shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The SC-280 dock requires a clean contact cycle to accept the new 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 SC-280 cuts out mid-transmission on a freshly inserted battery\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNew Li-ion cells ship at storage voltage — typically around 3.6–3.7V per cell, giving roughly 7.2–7.4V at the pack level. When you press PTT, transmit current spikes sharply and the BMS may interpret that draw as an overcurrent event if cell voltage is already sitting at the low end of the acceptance window. The radio drops out of TX mode as the protection circuit opens. Charge the pack fully before first transmit use — the BMS trip threshold sits comfortably above the overcurrent point once cells are at 4.1–4.2V per cell.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after fitting this pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe SC-280 uses a simple voltage-threshold bar display — each bar corresponds to a fixed voltage band, not a fuel gauge calculation. A new pack at storage voltage will read one bar lower than a fully charged pack even if the cell health is perfect. This is not a fault with the battery. Dock the radio for a full charge cycle and the indicator will step up to the correct bar count once cell voltage crosses the next threshold, typically above 7.8V at the pack terminals.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426275164250,"sku":"BWCS-TMR380TW-1","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426275197018,"sku":"BWCS-TMR380TW-2","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426275229786,"sku":"BWCS-TMR380TW-3","price":55.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TMR380TW-1.webp?v=1779930523","url":"https:\/\/batteryweb.com\/products\/smartcom-sc-280-replacement-battery-74v-2050mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}