What I like about this battery c is its metal body and rubber turn allowing it according to the manual withstand a drop of 2m. access to USB ports, 1 Micro USB for charging and USB A to plug the cable from your small device is removing the cap that allows dustproof as well as the system water projections (Ip 67). With this battery, which comes with its micro USB cable a meter as well as a small bag, j cares or not I put it in my construction truck that is not necessarily clean. 2000mah for playback on devices with 1A, prove enough to completely charge your phone. I 've put only 3 stars because for the price I m also expected to charge my ipad (2d generation). There is a button to activate the charge when you connect the cable. Blue LED will let you know the battery charge status.