If you travel, it is great to bring one of these External Battery USB Portable Chargers along with you in case you find yourself needing to charge your phone or other portable devices. Here’s a nice one that Amazon is offering right now for 57% off. It is highly rated with over 2,700 reviews!

Amazon has a hot deal on the RAVPower® Element 10400mAh External Battery USB Portable Charger (reg $39.99.) It’s on sale for $24.99 right now and then if you use promo code CAUC655C, you will get it for only $16.99! Ships free with Prime!

Amazon: RAVPower Battery Travel Charger 57% Off

• RAVPower® Element 10400mAh External Battery USB Portable Charger
• Use promo code CAUC655C at checkout
• Ships free with $35 order or with Prime

• 10400mAh of capacity. Charges all iPhone four to five times, a Galaxy S3 thrice, or an iPad / iPad 2 once.
• Android 5V / 3A (max) port charges Android devices and iPhone with iOS 5 or higher at full speed, iPad with iOS 5 or 6 at 1.5A, or iPad with iOS 7 at 1A; Apple 5V / 3A (max) port charges iPhone at full speed or iPad at 1A (Android devices at 0.5A). Note: this product CANNOT charge Samsung or Asus tablets.
• A lightweight, unassuming solution to life’s daily power needs (8oz). LEDs display just how much juice you’ve got left. Reliable lithium polymer core ensures quality, supplying you with more than 500 charge cycles during the course of its life.
• Input: 5V / 1.5A; Use a 1.5A adapter (not included) for fastest charge times (8 hours).
• Package contents: 10400mAh Travel Charger / Portable Charger , 2 x USB to Micro USB Charging Cables, travel pouch and detailed instruction manual.