Solution 33711: Best Care Practices for TI Products With a TI Rechargeable Battery.
How can I best care for my TI Rechargeable Battery?
Lithium-ion batteries have a limited life which is defined by several factors: environment, storage, the number of charge/discharge cycles, and level of discharge/charge.
To extend battery lifespan and battery life, we recommend following these guidelines:
1. Keep TI calculators in a cool, dry place, as close to room temperature as possible
- Batteries are designed to optimally operate at room temperature.
- Exposure to heat and/or humidity can reduce lithium-ion battery life.
2. Usage and Charging:
- As lithium-ion batteries age, they lose capacity. When properly maintained and under normal usage, batteries are expected to last about 3 years.
- The TI-84 Plus CE calculators can last a maximum of one month on a single charge. The TI-Nspire CX II/CX II CAS calculators can last a maximum of one week on a single charge. This charge length is if used for 2 hours a day. Charge length can be greatly reduced with heavy usage such as running for 8 hours a day, using data collection devices, or running TI-Basic/Python programs.
- Never let the battery fully deplete. Recharge the battery at least every 2-3 weeks, but avoid leaving the calculator connected to a charging device for longer than 3 days.
- Use only genuine TI Rechargeable Batteries in your TI graphing calculator.
- If you are using a wall charger, make sure you are using the TI wall charger that came with your calculator or other UL-certified USB charger rated for at least 1 amp (usually written as “1A” or “1000 mA”). To determine whether your charger is UL-certified, flip it over to the inside, and read the label. Look for the UL stamp, and confirm that it states that it is 1000 mA or higher.
- Do not charge the battery outside of the temperature range of 32-100°F/0-37° C.
- When connected to any type of TI Docking Station, a USB Wall Adapter or a computer, the battery levels of TI calculator products do not provide real-time updates.
- Laptop Computers can charge a TI Rechargeable Battery, but the laptop may have to be connected to a power source to do so.
- If your rechargeable battery is 3 years old or more, it may be time to purchase a new TI Rechargeable Battery.
Please Note: If it’s time to replace your battery, you can place an order for a TI Rechargeable Battery through the TI Online Store or by calling TI-Cares.
3. Storage tips for TI calculators with TI Rechargeable Batteries that will not be used for 3 or more months:
- Prior to storing TI graphing calculators, ALWAYS CHARGE THEM FULLY, to 100%.
- If practical, remove the battery from the calculators. If calculators are stored with the batteries engaged, they will discharge more quickly and can become deeply discharged.
- The best temperature for proper care and storage of lithium-ion batteries is between 32-77°F/0-25° C.
- DO NOT STORE A TI RECHARGEABLE BATTERY INSIDE A CALCULATOR FOR LONGER THAN 3 MONTHS WITHOUT CHARGING THE CALCULATOR. Otherwise, deterioration to the lithium-ion cell may occur and reduce both battery life and capacity.
4. Update Calculator Operating System (OS) as new updates become available:
- Update your TI graphing calculator's OS as new releases become available. OS updates may contain new programs to optimize battery life.
5. Replacing a TI Rechargeable Battery:
- For Instructions on how to replace a TI Rechargeable Battery in a TI-Nspire CX calculator please click here.
- For Instructions on how to replace a TI Rechargeable Battery in a TI-84 Plus CE calculator please click here.