Today we'll take a look in to a few different portable battery pack offerings from companies from around the globe. You?re quite possibly just like me ? in the beginning you weren't exactly certain why people would want or need to invest in a portable battery and maybe even thought of them to be quite useless. Then came along my Galaxy S4. As great as the phone performs, even when I?m out and about at tech expos? or traveling around, my phone will be flat in a few hours ? even with all precautions possible taken.

Screen brightness down, check. GPS off, check. Wireless disabled, check. Background applications closed, yep. Then, as your 6th hour away from a USB port rolls around, you hear that all-too-noteable ?bloop bloop? ? your phone is warning you that only 15% of your battery remains. In comes our hero, in the form of a 5,000 mAh ? 11,000 mAh power bank. If you?re going to take most large-brand consumer phones into account, they'll be providing you with an average battery sizing of around 2,600 mAh ? as seen in Samsung's Galaxy S4. If you?re running a 5,000 mAh battery pack and take into account some small power losses along the way, you?re looking at about 1.8 full charges of your device.