Hi, I have a 10 years old jr x-388s transmitter. Few days ago it displays a backup error when I switch it on. So I replaced the internal lithium battery with a cr2032 lithium battery (almost the same that my transmitter has inside).All OK, the transmitter switches on with out any error message, but when I switch on AFTER FOUR DAYS, I see again the "backup error" message, I switch off, then switch on with out "backup error" but it has reset all memory entries. The transmitter works fine but when I store it for a few days without using it, then when I switch it on, it displays for one time the "backup error" and when I switch it on again it works but with no model data stored in its memory. Can anyone tell me what happens ???