Portable Power 5400 and 2500 by Incase is a stuff that’s exactly what you may need on outdoor activities. In addition to extremely portable, it’s a really compact piece of gadget that fits in almost anywhere you want e.g., in your pocket or backpack etc. These power stations are meant to juice up real quick. The portable power pack of 5400mAH is basically a double charge battery and when fully charged, it can capacitate to charge your smartphone (typically an iPhone) twice. The 2500mAH single charge battery charges full and fast (2.1 amp output) most of your USB devices. A series of LED lights display the charging process.
Available at goincase.com for $60+