1, if it is 1#, 5#, 7# battery, you can directly measure the two ends of the battery with the maximum DC current of the digital multimeter. However, when measuring the maximum current, you only need to read the maximum value of the moment just turned on. Long-term testing can cause the battery to discharge quickly and lose its effectiveness.
2, if it is calculated, first calculate the internal resistance of the battery cannot calculate the maximum discharge current? But the calculation of internal resistance needs to be connected to the load to do the discharge experiment, which is troublesome.
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