Texas Instruments Sr 50a Battery Pack

New bp 1 battery pack for ti 59 58 58c sr 50 50a 51 51a 56 52 calculators in consumer electronics gadgets other electronics calculators. The sr 50a was introduced shortly after the sr 50 to to reduce manufacturing costs. I rebuilt the battery pack and it s operating perfectly.

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All this calculator needed was a little internal cleaning and a battery pack.

Texas instruments sr 50a battery pack.

Ti bp 1 battery pack installation use care instructions. Rebuilt texas instruments bp 1 battery pack 1000mah nicd nickel cadmium cells the pack was rebuilt using original ti components. Please find the comparision in the calculator forensics. Item 6 vintage texas instruments sr 50a slide rule calculator and case untested as is 6 vintage texas instruments sr 50a slide rule calculator and case.

The only advantage compared to early sr 50 calculators is the higher calculating precision. It enhanced their earlier sr 10 and sr 11 calculators introduced in 1973 which had featured scientific notation squares square root and reciprocals but had no trig or log functions and lacked other features the sr 50 was introduced in 1974 and sold for us 170. This pack works with ti 59 ti 58 ti 58c sr 50 sr 50a sr 51 sr 51a sr 52 and sr 56. The pack ships fully charged.

The hardware of the sr 50a uses the tmc0501 arithmetic chip with an accuracy of 13 digits and the tmc0521 scanning read only memory scom containing 1k 13. They lasted a few hours and took all night to recharge with the calculator plugged into a power supply. The sr 50 was texas instruments first scientific pocket calculator with trigonometric and logarithm functions. It held 3 rechargeable nicad batteries.

A number of ti calculators the classic series all used the bp1a battery pack. The nicads always eventually die and ti doesn t sell the packs any more.

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