一秒檢測電池是否沒電，不用再靠測電器了！（Amazing Way to Test Batteries!）
這方法真的很簡單，也有科學根據，那至於準不準確就是測試者的問題囉 XD
我們都知道日常中使用的電池其實是化學電池，跟我們之前介紹手機常用的電池不同，裡面的化學物質在放電使用後重量會變輕，這時候其實可以由重量之道這電池是否有用過，影片中就是用此種方法，透過用玩的電池在撞擊桌面時會發出不同的聲音，以及用玩的電池不容易站立很容易導下去做檢測...
It turns out that when the alkaline in a battery wears down, it produces a gas that fills the inside. So if you've got a box of random batteries you want to test, and don't have access to a voltmeter or any other device, you can simply drop them vertically a short distance onto a hard surface. A charged battery will make a solid thump sound and often remain standing, while a dead battery makes a muffled sound, bounces repeatedly, and then topples over.
What could be easier? (That doesn't involve your tongue or mild electric shocks.) [YouTube via The Awesomer]
我們都知道日常中使用的電池其實是化學電池，跟我們之前介紹手機常用的電池不同，裡面的化學物質在放電使用後重量會變輕，這時候其實可以由重量之道這電池是否有用過，影片中就是用此種方法，透過用玩的電池在撞擊桌面時會發出不同的聲音，以及用玩的電池不容易站立很容易導下去做檢測...
It turns out that when the alkaline in a battery wears down, it produces a gas that fills the inside. So if you've got a box of random batteries you want to test, and don't have access to a voltmeter or any other device, you can simply drop them vertically a short distance onto a hard surface. A charged battery will make a solid thump sound and often remain standing, while a dead battery makes a muffled sound, bounces repeatedly, and then topples over.
What could be easier? (That doesn't involve your tongue or mild electric shocks.) [YouTube via The Awesomer]
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