In the jungle of backup batteries, an interesting and powerful device. The choice is often complex: price, weight, capacity etc. Black gray and orange button, in very strong aluminum alloy. The touch of the device really gives the impression of holding a serious object in his hands. Impression confirmed in duration: 3 weeks, she served daily unabated. Think back regularly in the current and do not wait until the complete discharge to preserve it, as it should with all rechargeable batteries.) Some will be the choice of the model, its acquisition is almost indispensable if one wants to run the risk of ending up with a dead battery, miss important calls, to help in any circumstance because our bags contain more and more although small consuming devices :) I have tried a lot, not all offer the same features, however they are almost always perfect for reliable use. On a larger size hardly a lipstick tube, 200 grams live weight, it keeps its promises by offering aesthetically pleasing without yielding to the power: a complete smartphone in less than two hours and crumbs Once a Kindle reading light, a battery of e-cigarette, m3 player, an iPad 2 to close to 75% etc. Conventional battery use, the most important: support to turn it on and off for as long -plus two for a pleasant light and well worth the evening to find his keys in the bag - the super annoying tuc - or pick up the door -Currency falling away from any street lamp (another classic in the sadly well-known category: "the evil things"). Product securing therefore on this point (like almost all must admit) His gray suede pouch, aesthetic and useful to preserve this gem in the bag or pocket Loading childish (wall or USB on a PC) that enables use to throw away the manual saves time! Cable (must of course have the original charging cables of your devices or replacement. Secure and reliable, it has not left my bag as it is practical. It is a good investment in terms of quality / price.