Texas Instruments BA-II (Taiwan)

Date of introduction:  1984 Display technology:  LCD
New price:   Display size:  8 (5 + 2)
Size:  5.3" x 2.8" x 0.45"
 135 x 70 x 11 mm3
Weight:  2.3 ounces, 64 grams Serial No:  1509991
Batteries:  2*LR44 Date of manufacture:  mth 03 year 1985
AC-Adapter:   Origin of manufacture:  Taiwan
Precision:  11 Integrated circuits:  TP0322
Memories:  1    
Program steps:   Courtesy of:  Joerg Woerner

The BA-II used the calculator chip of the 1978 model Business Analyst II again with a new styling.

A deeper exploration of the BA-II reveals two different designs, the first was introduced already in 1984 together with the BA-35, TI-30 III and TI-35 II. The second design - like the counterparts BA-35, TI-30 III and TI-35 II - was manufactured in USA and Italy.

Please don't miss the rare prototype BA-III from 1983 - and don't be confused with the BA-III introduced in 1986.

Main difference between these calculator pairs is their origin and internal construction:

Model Origin Introduction PCB construction
TI-30 III Taiwan year 1984 rigid PCB
TI-35 II Taiwan year 1984 rigid PCB
BA-II Taiwan year 1984 rigid PCB
TI-30 III USA, Italy year 1985 flexible PCB
TI-35 II USA, Italy year 1985 flexible PCB
BA-II USA, Italy year 1985 flexible PCB

TI-BAIIN_Detail.jpg (28701 Byte)TI-BAIIN_1_Detail.jpg (31925 Byte)Even the display frame of the BA-II siblings is different, just compare the position of the thin lines above and below the window. (Left picture shows original design).

TI-BAIIN_PCB.jpg (61965 Byte)TI-BAIIN_1_PCB.jpg (52870 Byte)The internal construction of the two calculators is completely different, the original design (left side) uses a rigid printed circuit board (PCB) with a solid metal frame for the LC-display and a conventional battery holder. The later design manufactured in Italy uses a flexible board with a clamp to contact the display and batteries. We know this type of construction from a long line of TI calculators. 

About two years later
the solar powered BA-SOLAR was introduced, this calculator uses a brain from Toshiba instead the TI calculator chip. 

The BA-II was later replaced with the BA II PLUS. Sandwiched between these two calculators you'll find the rare BA-III.

Compare this traditional calculator with the advanced Business Edge or the powerful Financial Investment Analyst FIA-10.

A very similar calculator was sold from Radio Shack as EC-5100.

New Specialties, Inc. based in Vidalia, Georgia introduced in 1987 with the APOTHECALC computer an interesting product using the flexibility of the BA-II calculator design proven already with the Jeppesen Sanderson Avstar flight computer.

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If you have additions to the above article please email:

Joerg Woerner, May 13, 2003. No reprints without written permission.