FNB-41xs : 9.6 volt 1450mAh rechargeable LONG LIFE high-watt NiMH battery for Yaesu & Vertex radios. Exclusive designed product. Includes belt clip. This is a high-grade replacement for FNB-41 and FNB-42. EXCLUSIVE ITEM ! Fits FT-50, FT-50R, FT-40R, FT-10R; VXA-100, etc. Charges up thru the radio (if your radio has a plug jack on it) with a Wall Charger (NC-88B) or DC Charge Cable (E-DC-5B), OR in a desktop Smart Charger (such as the EMS-41-47).