{"product_id":"cobra-frs120-replacement-battery-48v-800mah-ni-mh","title":"Cobra FRS120 Replacement Battery 4.8V 800mAh Ni-MH","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eCobra FRS120 \/ FRS117 \/ FRS225 — 4.8V Ni-MH Replacement Battery (FA-AA)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 4.8V, 800mAh Ni-MH battery pack for the Cobra FRS120, FRS117, and FRS225 consumer two-way radios. It replaces OEM part numbers FA-AA and COM-FAAA. The pack slots directly into the radio's battery compartment and restores full transmit and receive function.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eFRS120, FRS117, and FRS225 compatibility:\u003c\/strong\u003e\n    These three Cobra models share the same battery bay dimensions and 4.8V four-cell Ni-MH voltage rail. The connector pinout and physical form factor are identical across all three, so one pack covers the full group.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through transmit loads on an FRS120 body. The cells held voltage through repeated PTT bursts without triggering the radio's low-battery cutoff, and the charger accepted the pack on first insertion without error.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst cycle on Ni-MH packs:\u003c\/strong\u003e\n    Ni-MH cells ship at partial charge. Run the radio until the low-battery indicator shows, then charge to full before the second use — this lets the cells balance and reach rated capacity faster than partial top-ups from new.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the FRS120 cuts out mid-transmission on a fresh pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eWhen you press PTT, transmit current spikes sharply — well above the current draw during standby or receive. A Ni-MH pack that shipped at low storage voltage can't sustain that spike cleanly. The radio's internal protection circuit sees the voltage dip as a fault condition and drops the transmission. This is not a defective battery — it's a storage-state issue. Charge the pack fully before the first PTT use and the cutout stops.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after install\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe FRS120 reads voltage thresholds and maps them to bar segments on the display. A new Ni-MH pack sitting at storage voltage — typically around 4.6V — falls below the threshold the radio expects for a full reading, so it displays one bar short. This is not a capacity fault. Put the pack through a full charge cycle first; resting voltage rises to the expected range and the bar indicator catches up.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426365309018,"sku":"BWCS-CRS120TW-1","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426365341786,"sku":"BWCS-CRS120TW-2","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426365374554,"sku":"BWCS-CRS120TW-3","price":28.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CRS120TW-1.webp?v=1779930808","url":"https:\/\/batteryweb.com\/products\/cobra-frs120-replacement-battery-48v-800mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}