How does the extra battery keep it's power?

I'm going to europe for 5 weeks i need to know if you replace the batteries or do u charge the pack.

Kensington Mini Battery Pack and Charger for iPhone and iPod

Kensington Mini Battery Pack and Charger for iPhone and iPod

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1 Answer from the Community

  • Best Answer:

    You plug it in with a USB cable either into a computer or you can buy a plug like the one from apple to plug it into a wall