August 10 2013. 

Replacement batteries are the same shape and size as the battery that came with your equipment. Therefore, a replacement battery attaches or inserts into your device just as the original battery does. This means your equipment retains its original form regardless of which battery you have installed at the time. You effectively double the life of whatever electronic device you purchase it for, and the cost is typically less expensive than that of an external battery. However, you will have the added weight of another battery to carry around with you, and they also take up extra space in whatever case you decide to carry them in. You will also find that replacement batteries are rarely universal and will only fit the device they were originally designed for.

   Although larger than replacement batteries and initially more expensive, external batteries work with thousands of different devices and provide a significantly greater amount of power. Depending on which model of external battery you decide to purchase, you may even be able to charge multiple devices at the same time. This means you can purchase one external battery and forgo buying replacement batteries for each specific device, making external batteries very useful for those who like to charge their iPhone®, laptop, iPad® and anything else they use all at the same time.

   Whether you choose to purchase a replacement battery or an external battery, the solution for meeting your ever-growing demand for additional power is at your fingertips. Regardless of which one you decide to go with, the stress of needing an electrical outlet to keep your devices running will be eliminated, and that time can be better spent on using them for what they're intended for.   www.oct-power.com