There are numerous battery ideas out there, but this one really stands out. As EXOGEAR claims “World’s First Stackable Battery Pack” might be the first to cause you to think if you need another one. This battery is priced at $90 for the main one and $50 for additional stacks. Each battery is made up of a 5,200mAh Lithium Polymer and contains a ports for 30-pin (Apple products), Micro-USB, and USB. Finally, on their website they also claim that it’s coming soon, so you’ll have to wait a bit if you decide to buy one.