Compared with the method to arrange a button battery to illume, the utility model not only reduces the expense of the people, but also prevents the environment pollution problem caused by the battery.

与在钥匙上设有纽扣电池的照明方法相比，这种方法不仅降低了人们的应用开支，且也避免了由电池带来的环境污染。

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Compared with the method to arrange a button battery to illume, the utility model not only reduces the expense of the people, but also prevents the environment pollution problem caused by the battery.

与在钥匙上设有纽扣电池的照明方法相比，这种方法不仅降低了人们的应用开支，且也避免了由电池带来的环境污染。

youdao