One thing that the mobile market brought with it is a need for power. While it is true that the battery life of our mobile devices has increased it is still not where many would like it. There are a number of reasons for this, but most revolve around the fact that as you use your device the components need more power (obviously). While Intel, AMD and the various ARM manufacturers argue about who is more power efficient most of us still long for the day when our mobile devices can last much longer than they do now. One of the more common solutions to this is the portable battery. We have taken a look at t a few of these before and now have another one in the lab. This time we have the RAVPOWER RP-PB04 10000mAh battery pack so let’s see if it can keep our devices powered.