About two years ago,   I was invited to design the third style power bank in 2012. At that time, i thought  it is only a container that looks like the cup or pocket shape to accommodate something. As an traditional  power bank that attached input and output design, i did not want to see the ugly shape to apply our product, so i decided to hide the shape instead of date line to solve the problem. it will accomplete my good idear that battery charging、electro-discharge and standby electric.