Meritline offers this 5,000mAh Backup External Battery Pack Charger for $15.99 with free shipping. That's $4 under our January mention of a similar item and the lowest total price we could find for a comparable item today by $26. It's compatible with most phones (including the iPhone), tablets, and other 1A-compatible devices. It features a built-in LED display and USB connectivity.

Expect this item to take two to three weeks to arrive.