Published: 04 Jan 2018 › Updated: 04 Jan 2018
自带测电量的碱性电池
前几天鼠标电池告急，JD 上搭单买了金霸王回来。更换的时候发现这电池上写着连体测电带字样。
原本以为这只是个广告，不会真的能测电池电量。
不过，忍不住好奇心。
两手指按住“按”的地方，测电带神奇的亮了起来。长见识了！
测电原理猜是电流发热使温敏材料变色。亲测热水杯贴上去也会亮。via：金霸王测电带的秘密
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