Precautions - Rechargeable Batteries 

How do I take precautions when using rechargeable batteries?

Precautions for Rechargeable Batteries 

• Do not expose batteries to temperatures above 140°F (60°C).
• Do not disassemble or mistreat batteries.
• Use only the charger recommended for the cell or battery, or the one that was provided with the original equipment. 
• TI recommends that you use the USB cable included with this calculator. If you choose to use a third-party power adapter with the TI-supplied USB cable, you should use an adapter that meets applicable safety and operational standards and certifications, including UL and CE certifications.

Take these precautions when replacing rechargeable batteries:

• Replace only with a TI approved battery.
• Remove the cell or battery from the charger or alternating current adapter when not in use or being charged.
• Use of the battery in other devices may result in personal injury or damage to equipment or property.
• Do not mix brands (or types within brands) of batteries. There is a risk of explosion if a battery is replaced by the wrong type.