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versatile battery / battery

versatile battery
versatile battery

If you turn the cross -section,the size of battery will change AAA to AA.Because both the length and the diameter of the battery would increase.

University

zhejiang university

zhejiang university
hangzhou, China

Design

zhejiang university

zhejiang university
hangzhou, China

Yang chen, Mo Hu, Qian Jiang, Xiaolong Lou