Hi, I have 3 Ailunce HD1 handhelds. I have the latest firmware in all 3 If I don't use for more than a day when I turn on I get a black screen When I turn on a 2nd time it always works But the date goes back to factory set 1970 This happen with all 3 radios very frustrating Thanks,
Dear，there is a little battery. It controls the date and time. Power on will charge automatically. So if you long time no turn on the radio. and when the little battery drain, the time will reset when you turn on the radio again. Normal use, the radio will not appear time reset or power on twice phenomenon.