Education Technology

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 simple guidelines:

  1. Avoid heat and humidity:
    • Batteries are designed to optimally operate at room temperature.
    • Heat can reduce lithium-ion battery life.
    • High humidity environments should be avoided.
    • Keep TI calulators in a cool, dry place. As close to room temperature as possible is ideal.

  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.
    • Charge battery often and avoid waiting until full discharge.
    • Do not leave the handheld connected to charging devices for periods longer than 3 days.
    • Use only rechargeable lithium-ion batteries approved for the handheld.
    • Use the calculator regularly and fully charge it at least once per month.
    • 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.

  3. Storage tips for TI calculators with TI Rechargeable Batteries that will not be used for 3 or more months:
    • The best temperature for proper care and storage of lithium-ion batteries is between 0-25° C/32-~77°F.
    • Do not allow the TI Rechargeable Battery to be stored in a calculator for longer than 6 months without charging the calculator, or else deterioration to the lithium-ion cell may occur and reduce both battery life and capacity.
    • Prior to storing TI graphing calculators, the units should be fully charged.
    • It is ideal to store batteries disconnected or removed from the calculators before storage.If calculators are stored with the batteries engaged, they will discharge quicker and can become deeply discharged.

  4. Update Calculator Operating System 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. For Instructions on how to replace a TI Rechargeable Battery in a TI-Nspire calculator please click here.
    For Instructions on how to replace a TI Rechargeable Battery in a TI-84 Plus CE calculator please click here.