I purchased this a few weeks ago, as my Droid Razr has a terrible battery life, and it has been nothing short of excellent. The main function of this product is to recharge mobile devices on the go, and this delivers, flat out. It is able to charge my phone in under an hour. It is very small and lightweight for the 5000 mAh (miliamp) charge capacity it carries, and is not excessively bulky or weighty in a pocket, backpack, etc. The laser and LED flashlight are also excellent additions, great for presentations, etc. Overall a great product, 5 stars!