One side had electrical contacts for all 26 letters.

它一面有 26 个接触点，代表 26 个字母。

Researchers at Graz University of Technology in Austria, for example, have developed a version that has its electrical contacts coated with carbon which is pierced by tiny pores.

例如，奥地利格拉茨科技大学的研究人员已经开发出了一种电触点上涂着能被小孔穿透的碳的电池。

It also results in a bunch of side reactions that produce useless contaminants, reducing a battery's capacity, and it could even damage the internal structure of the battery, leading to a loss of electrical contact and failure.

还会引发一连串的副反应，产生无用的污染物，损害电池的容量，甚至可能损坏电池的内部结构，形成断路导致电池失效。

It also results in a bunch of side reactions that produce useless contaminants, reducing a battery's capacity; and it could even damage the internal structure of the battery, leading to a loss of electrical contact and failure.

它还会导致一系列副反应， 产生无用的污染物，从而降低电池的容量；甚至可能损坏电池的内部结构，导致电气接触丧失和故障。