How to determine if the battery is good or bad ?

Determine the battery is good or bad , we must first understand the form of battery damage , damage to the following general categories: positive plate to soften the negative plate sulfation , plate shorted circuit and so on. Can be used to judge the quality of the battery test equipment and experience of law:
First, the instrument test : general use battery discharge tester, the tester two were gripping pliers measuring positive and negative battery positive and negative electrodes , press the test button , observe the test instrument instruction situations:
1, if the instrument described above indicate voltage 9V battery in good condition.
2 , if less than 9V , but does not move the pointer is a numerical description of the state of the cargo trikes battery in a loss of electricity needed supplementary charge .
3, if the pointer is slowly declining description of the internal battery has a short circuit .
4 , the pointer quickly dropped to 0V description of the internal batteries are disconnected.
Second, the empirical method : observation battery electrolyte is muddy , muddy explanation battery positive plate to soften. Observe whether there is sediment at the bottom of the battery , if the battery capacity has been described plate off deficiencies . Hand percussion batteries have two electrodes pile If you hear a hollow sound explanation piles and poles plate fracture . With a thick wire shorted to observe the positive and negative battery post dosing each hole , as found in a compartment bubbles indicating that every corrupt.