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Display battery solve the problem about that it was hard to tell the difference between the two rechargeable battery by using the EL luminous film to display the quantity of electricity.
When we want to know the quantity of electricity, just need to press the battery-shape button on the rechargeable battery, EL luminous film will shine to display the quantity of electricity.
National Taipei University of Technology
Taipei, Taiwan
National Taipei University of Technology
Taipei, Taiwan
Li Cheng-Yang
Zhang Jia-En
