On Mon, Sep 2, 2024 at 06:11 PM, Edward Prest wrote:
if it took 30+ years to get so leaky, then I would still replace it with a new schottky - and a new battery.?
I agree.
I'm not an 'expert' but 'experts' maybe don't know what really goes on at a fab (or what prayers the engineers say, during the fabrication process.)
Maybe materials are 'better' and 'clean rooms' are cleaner too.
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Anyway to hold back against a cell (or battery) discharging into the charging circuit... perhaps a BAT42 (or BAT 43) ... which has about 0.3 V drop, at 10 mA forward voltage, and about 100 nA at 10 volts reverse voltage, at 25 C.? Maybe those would do.
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Reverse leakage current increases exponentially with current. So maybe it's not a good idea to cook these things.
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And yes...how many of these fine instruments... with SRAM battery backup problems... are going to be in use... even 10 years from now... especially, by the person whose problem this originally was.
