Texas Instruments · Calculators
Texas Instruments TI-89 Titanium battery
4 × 1.5V alkaline cell
- Based on
- Texas Instruments documentation
- Last checked
- 7 October 2026
- Size
- 10.5 × 44.5 mm
- Voltage
- 1.5 V
- Rechargeable
- Not supported
Other batteries in this device
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How to replace it
Follow the manufacturer steps in the sources below.
Sources
Last checked 7 October 2026
Need a AAA?
Texas Instruments TI-89 Titanium uses 4 × AAA.
Buy links go to Amazon (Associates where tagged) or other affiliate programmes when available. They never change the battery answer.
Helpful for this device
Optional tools for opening, testing or charging — separate from the battery answer.
Amazon links may earn us a commission. They do not change the battery answer.
Ansmann Energy Check LCDQuick household cell check (good / low / replace)
ZTS Mini-MBT Multi-Battery TesterMore informative state-of-charge style checks across common formats
Battery testerQuick good / low / dead check for household cells
Crude check only — does not measure capacity under realistic load.
Buy links are optional and separate from the battery answer.