This Technology invented somewhere around 2011, but we got to know recently only so we like to share this news with our Hi Panda Tech Fans. This is an ordinary rechargeable battery special feature is we don’t need the recharging unit for this, just connect USB cable to Phones, Laps, PCs, Etc. Inventor made people need very easy and fast. But only one issue to tell about this charging they demonstrating each battery getting separate cables, it much better to have one USB port can with three or more charging pins, that saves time too. Other than that this an awesome product.