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Measurement of Internalinternal resistance of a battery

FoundI found two circuits online of almost same approach to measure internal resistance of a battery. Both the methods excite the battery at 50Hz using a square wave and AC voltage drop is measured across the battery (as per my understanding). And apparently, this voltage drop corresponds to the internal resistance of the battery

Method 1: https://www.eeweb.com/internal-resistance-tester-for-batteries/

Method 2: http://www.next.gr/meter-counter/Checker-Circuits/Internal-Resistance-Battery-Tester-l13989.html

In the method 1, it is mentioned that the voltage measured divided by 10 gives the internal resistance of the battery. And method 2 says, the internal resistance is 10 times the voltage measured. I request someone to please breakdown why it is so? whatsWhat's happening in these circuits and what is the difference between them?And And how reliable are these methods?Thanks in advance.

Measurement of Internal resistance of a battery

Found two circuits online of almost same approach to measure internal resistance of a battery. Both the methods excite the battery at 50Hz using a square wave and AC voltage drop is measured across the battery (as per my understanding). And apparently, this voltage drop corresponds to the internal resistance of the battery

Method 1: https://www.eeweb.com/internal-resistance-tester-for-batteries/

Method 2: http://www.next.gr/meter-counter/Checker-Circuits/Internal-Resistance-Battery-Tester-l13989.html

In the method 1, it is mentioned that the voltage measured divided by 10 gives the internal resistance of the battery. And method 2 says, the internal resistance is 10 times the voltage measured. I request someone to please breakdown why it is so? whats happening in these circuits and what is the difference between them?And how reliable are these methods?Thanks in advance.

Measurement of internal resistance of a battery

I found two circuits online of almost same approach to measure internal resistance of a battery. Both the methods excite the battery at 50Hz using a square wave and AC voltage drop is measured across the battery (as per my understanding). And apparently, this voltage drop corresponds to the internal resistance of the battery

Method 1: https://www.eeweb.com/internal-resistance-tester-for-batteries/

Method 2: http://www.next.gr/meter-counter/Checker-Circuits/Internal-Resistance-Battery-Tester-l13989.html

In the method 1, it is mentioned that the voltage measured divided by 10 gives the internal resistance of the battery. And method 2 says, the internal resistance is 10 times the voltage measured. I request someone to please breakdown why it is so? What's happening in these circuits and what is the difference between them? And how reliable are these methods?

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Nikeboy
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Measurement of Internal resistance of a battery

Found two circuits online of almost same approach to measure internal resistance of a battery. Both the methods excite the battery at 50Hz using a square wave and AC voltage drop is measured across the battery (as per my understanding). And apparently, this voltage drop corresponds to the internal resistance of the battery

Method 1: https://www.eeweb.com/internal-resistance-tester-for-batteries/

Method 2: http://www.next.gr/meter-counter/Checker-Circuits/Internal-Resistance-Battery-Tester-l13989.html

In the method 1, it is mentioned that the voltage measured divided by 10 gives the internal resistance of the battery. And method 2 says, the internal resistance is 10 times the voltage measured. I request someone to please breakdown why it is so? whats happening in these circuits and what is the difference between them?And how reliable are these methods?Thanks in advance.