A TI-84 Plus or Silver Edition runs on 4 AAA alkaline batteries, with a small SR44SW button cell that keeps the memory. The TI-84 Plus CE uses TI’s own rechargeable battery instead.
Which calculator?
The battery it takes
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TI graphing calculator batteries
| Calculator | Main batteries | Backup cell |
|---|---|---|
| TI-84 Plus | 4 AAA alkaline | SR44SW or 303 silver oxide |
| TI-84 Plus Silver Edition | 4 AAA alkaline | SR44SW or 303 silver oxide |
| TI-84 Plus CE | TI Rechargeable Battery | Not listed |
| TI-83 Plus | 4 AAA alkaline | SR44SW or 303 silver oxide |
| TI-83 Plus Silver Edition | 4 AAA alkaline | CR1616 or CR1620 |
| TI-89 Titanium | 4 AAA alkaline | SR44SW or 303 silver oxide |
| TI-Nspire | 4 AAA alkaline | None |
| TI-Nspire CAS | 4 AAA alkaline | None |
From TI’s knowledge base (solution 11876) and the TI-84 Plus CE eGuide. TI lists a silver oxide cell, not an alkaline LR44.
Change one kind at a time
TI says to replace all four AAA batteries at once, or the round backup battery on its own, but never both kinds at the same time. Taking both out wipes the calculator’s memory.
TI’s other precautions:
- Don’t mix new and used batteries, or different brands or types.
- Keep batteries out of children’s reach.
Charging the TI-84 Plus CE
TI says the CE’s battery charges in about four hours from a computer’s USB port, a TI wall adapter or a TI Charging Station CE, with the battery left in place.
Keep coin batteries away from children
The National Capital Poison Center says that if anyone swallows a battery, immediately call the 24-hour National Battery Ingestion Hotline at 1-800-498-8666 or your poison center at 1-800-222-1222. Don’t delay. Immediate treatment decreases severity.