This is one of the funniest concepts we have ever found while looking for Gadget News on a daily basis. This concept is called the Hungry Batteries which would really be a great way to notify us when our batteries needs to be replaced or recharged. The batteries will physically slim down when there is no power left as it is illustrated above, but as we always say at Loopy Gadgets, these concept never make it into production because they are “too cool to exist”.
The Brilliant Designer who came up with the concept is Mac Funamizu. Although the concept is cool, I totally agree with the guys over at SlipperyBrick, that it would be better to just add one of those strips that can tell how much juice is left.