... rechargeable battery and rechargeable battery supplies power to LED,CCFL,earphone jack,siren and AM/FM radio. AC ... charges rechargeable battery. Rechargeable battery supplies power to LED,CCFL,earphone jack,siren and AM/FM radio. Dry batteries ... hoursLuminosity of CCFLAbout 32000 MCDCCFL Lifespan About 25000 hours *CCFL:Cold Cathode Fluorescent LampAccessories: Mobile phone connections, mobile phone ...