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Additional Pictures 

 

This BA-20 Profit Manager Calculator was manufactured in June 1986 by 
Inventec Corporation in Taiwan (Date code I-0686 mth 06 yr 1986).

The BA-20 is powered by 4 solar cells with a LR54 (LR1130) backup battery and the clock module by a small LR41 battery.

The printed circuit board (PCB) of the BA-20 is centered
around a Sharp LI3163 single-chip calculator circuit.

Close-up view of the clock module.

Close-up view of the Sharp LI3163 single-chip calculator circuit.

 Close-up view of the PCB-Mark of a BA-20.


horizontal rule

If you have additions to the above article please email: joerg@datamath.org.

Joerg Woerner, March 18, 2020. No reprints without written permission.