The first two cell & battery testers that you showed us will not help you with Roomba batteries -- they are dedicated to checking specific low-capacity cells and batteries by applying various calculated internal loads to selected cells under test. Even the model #10 7-2 tester having a 20V capacity would be unable to tell you much of use about your 14.4V, NOMINAL, NiMH battery.mg06981 wrote:ok I found one that will tell me the voltage, I assume I should give it a full charge before trying to measure the voltage? ...
Even if you "test" a perfect Roomba battery, i.e., one that is known to be capable of operating Roomba for hours, that auto battery test will show the perfect battery as BAD! The reason for that is the tester applies a very heavy LOAD onto the battery under test. That test-load may be 50 times, or more, greater than the load that is reasonable to apply to a Roomba battery!mg06981 wrote:I tested the battery with the Load tester for cars and it read only 6V so I assume the battery is bad,
Great news! I think all readers passing this way will appreciate that work. FYI, your images will eventually be processed by an rr moderator or admin so that a low-rez image appears in line; and when that image is clicked a full-rez image will appear in a new window.Gordon I'll reduce the image sizes from now, Thank you.
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