Texas Instruments · Calculators
TI-84 Plus battery
4 × 1.5V alkaline cell
TI-84 Plus battery replacement uses four AAA alkaline cells plus one SR44SW (303) silver-oxide backup. Do not pull the AAA pack and the backup out together or you can lose memory.
Other batteries in this device
How to replace it
| Compartment | Rear battery cover |
|---|---|
| Settings / memory | Possible if AAA and backup removed together |
| Notes | Do not remove AAA and backup simultaneously |
| Access | Simple screwdriver |
Important
- Backup listed as SR44SW or 303 silver oxide on TI KB
- Some regional TI-84 Plus T docs mention LR44 backup — treat as variant, do not collapse
Sources
Helpful for this device
Optional tools for opening, testing or charging — separate from the battery answer.
- Ansmann Energy Check LCD
Quick household cell check (good / low / replace)
- ZTS Mini-MBT Multi-Battery Tester
More informative state-of-charge style checks across common formats
- Battery tester
Quick good / low / dead check for household cells
New battery but still not working?
A fresh 4 × AAA should restore Texas Instruments TI-84 Plus if the battery was the problem. Work through the checks below before replacing the device.
- Check the battery type
This device needs 4 × AAA (alkaline). Rechargeable cells are not supported for this device. Same size does not always mean the same battery.
- Check known model-specific issues
Backup listed as SR44SW or 303 silver oxide on TI KB Some regional TI-84 Plus T docs mention LR44 backup — treat as variant, do not collapse
- Confirm the battery itself
If you have a battery tester or multimeter, check the cell. A low open-circuit voltage often means replace; for rechargeable AA/AAA, a capacity test is more informative than voltage alone.
- 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-84 Plus is still sold new. Only buy another if a fresh battery and the checks above did not help.