HP-41C with 23A batteries - remedy possible?

[Jonas Sandstedt]

Thanks, all those perpiheral Components seem fine, and unfortunately only U2 remains. When installed, the batteries slowly lose voltage, so there is some kind of Power drainage. When measuring Vbat it is 4.8V, probably voltage drop over CR6. I will try to replace U2 which Ithink is HP specific.
best regards Jonas