I am curious how you can test if a batteries good or bad?
For instance I have used DMM to test the voltage of the battery but this doesn't really tell me if the battery is good....
Like I have measured 9volt batteries and they read 8.5 and work fine and then I have measured them at 8.6 and they don't work.... so the DMM is not a good way of judging
I am curious how these battery tester devices work to indicate if the battery is good or bad.... some of them even have the ability to tell you if it is at 60% , ....90% ,...etc of its full capacity...
Curious if their is a simply battery tester circuit that I could make ....
First though I need to know how the test is done is it by current or voltage ,,......
Thanks for any help
For instance I have used DMM to test the voltage of the battery but this doesn't really tell me if the battery is good....
Like I have measured 9volt batteries and they read 8.5 and work fine and then I have measured them at 8.6 and they don't work.... so the DMM is not a good way of judging
I am curious how these battery tester devices work to indicate if the battery is good or bad.... some of them even have the ability to tell you if it is at 60% , ....90% ,...etc of its full capacity...
Curious if their is a simply battery tester circuit that I could make ....
First though I need to know how the test is done is it by current or voltage ,,......
Thanks for any help