Anker manufacturers some of the best portable chargers and power banks out there. The PowerCore Essential 20,000 is among the 14 must have accessories for every day travel. It features 20,000mAh of power and a super slim design with a durable, textured exterior. There are also two USB ports for charging two mobile devices simultaneously. Weighing less than a pound and measuring 6.4 x 2.9 x 0.7-inches, the thin and lightweight Anker PowerCore Slim 20000 fits in any laptop bag, waist bag or purse without adding bulk. What’s more, Anker’s PowerIQ technology enables universal charging for just about any mobile device. It works with iPhone, iPad as well as Android phone and tablets and is a solid choice if you’re looking for a reliable, travel-friendly portable charger.