Amazon is currently including a free 2200mAh USB Charger when you purchase a $100 Amazon gift card. If you shop on Amazon as much as me, and don’t mind pre-paying for future Amazon purchases that you’re going to make anyway, this is essentially a free USB charger for nothing. The USB charger lets you top off phones, tablets, and other devices that charge via USB when you’re away from a power outlet. I like keeping inexpensive LED lights attached to these USB chargers so they double as flashlights. When you receive the gift card, simply redeem it to your own account to get the $100 back.