Texas Instruments · Calculators
TI-30X IIS battery
1 × 3V lithium coin cell
TI-30X IIS — also printed TI-30XIIS or TI 30X IIS — uses one CR2025 lithium backup cell. Solar power runs the calculator in bright light; change the CR2025 when it fades in dim rooms.
How to replace it
| Notes | Follow TI guidebook / support article for your model. |
|---|---|
| Access | Simple screwdriver |
Important
- Texas Instruments lists solar power for this model. The user-replaceable cell is the backup battery — not the only power source.
Sources
Helpful for this device
Optional tools for opening, testing or charging — separate from the battery answer.
- iFixit Essential Electronics Toolkit
Opening compartments that need precision bits
- Fluke 101 Digital Multimeter
Accurate open-circuit voltage and basic electrical checks
- Digital multimeter
Measure open-circuit voltage and general electronics checks
New battery but still not working?
A fresh 1 × CR2025 should restore Texas Instruments TI-30X IIS if the battery was the problem. Work through the checks below before replacing the device.
- Check the battery type
This device needs 1 × CR2025 (lithium). Rechargeable cells are not supported for this device. Same size does not always mean the same battery.
- Check known model-specific issues
Texas Instruments lists solar power for this model. The user-replaceable cell is the backup battery — not the only power source.
- Confirm the battery itself
For most coin cells, fitting a known-good fresh cell of the correct code is simpler than capacity testing.
- Still not responding?
If a correct, fresh battery installed properly does not restore the device, the fault may be elsewhere — the device may need service or replacement.
Need to replace the device?
Texas Instruments TI-30X IIS is still sold new. Only buy another if a fresh battery and the checks above did not help.