It is not hard to recognize these portable energy storage advantages. For potential buyers, first of all travel freedom - wherever they go, the power can follow them; Energy continues to come into being with the rechargeable and long life battery, which can be trusted for even emergencies when there is no grid electricity. The fourth point is last but certainly not least because it doesn't pollute, why have lots of loud machines around? In an era when everyone is talking about green energy and always seeking to reduce their carbon footprints, this environmental aspect of changing your ways to use clean power sources was not only overlooked but largely ignored. Last, not least: when you need power, it's simpler than ever with simple operation; for any user looking for a reliable portable power source (small size and multiple functions).