This document discusses sodium-ion batteries and their potential future use. It also mentions lithium batteries and compares sodium batteries to lithium batteries. Finally, it suggests sodium batteries may be rechargeable using the human body.

1. Batteries
Sodium-ion battery Future (:

2. Batteries
Sodium-ion batteries

3. Batteries
Lithium batteries

4. Sodium Batteries
Lithium batteries

5. Sodium Batteries
Recharge with Human Body