Finish the following sentence with the best choice: How to make a simple hand warmer.

Choices:
- Wrap electrical wire around an old iphone 6 and shake until it heats up.
- Connect two AAAA batteries in series with electrical wire, then wrap the batteries in securely in tinfoil.

Answer:
Connect two AAAA batteries in series with electrical wire, then wrap the batteries in securely in tinfoil.