Amazon is offering the Anker Astro 5600mAh Portable Power Bank Pack External Battery Backup Charger for only $19.99 (with free shipping for Prime members). Just enter the code: DL4E3IAJ at checkout to see the price drop. That’s $30 off the list price and the lowest we’ve seen it for. The Anker is a high capacity Lithium-ion battery (5600mAh) that allows you to get 2-3 full charges or add 22 hours talk time to your iPhone. It also comes with a convenient flashlight and 4 LED indicators reveal the battery level.
Amazon customers gave it a 4.5/5 star rating and left positive reviews.