Re: My Smart-1 4 line looses programming
I have changed battery on 2 of the American versions, one works like it should, but the other does not.
The other got a battery across the 5V capacitor, in series with a diode, I used a Li-ion battery (18650) and a resistor shunting the diode so it will "charge" with 0.1 milliamp to keep it full. (Do not know how that will turn out, but at least with new battery it keeps the memory for at least 12 hours, and so long power-out does "never" happen.
dsk
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