Take these precautions when replacing rechargeable batteries:
| • | Use only the charger recommended for the battery, or the one that was provided with the original equipment. |
| • | Remove the graphing calculator from the charger or alternating current adapter when not in use or being charged. |
| • | Do not use the battery in other devices because: |
| - | This may result in personal injury or damage to equipment or property. |
| - | There is a risk of explosion if a battery is replaced by the wrong type. |