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I don't understand why I can't get any of my five testers to work with any of my four 7-cell batteries. The tester identifies the configuration as "7CS" and tells me that the seventh cell voltage is in excess of 7V, whilst a different type of tester gives a correct reading of around 4V. When placed in an 8-cell setup (constructed especially to investigate this problem), the tester additionally tells me that the eighth cell voltage is zero and it sounds the alarm continuously. If the device worked correctly it would be ideal for my requirement and so I would very much like to re-order, but I'm concerned that I would encounter the same problem and would have to claim another refund. I can't seem to get any help with this problem over and above a no-quibble refund. Incidentally, older variants of this device as seen in YouTube videos seem to work properly, but they identify a 7-cell configuration as "7CE" rather than "7CS". It may be that an updated version of this device was not tested properly before release.Read full review
Verified purchase: Yes | Condition: New
Simply a must have battery check
Verified purchase: Yes | Condition: New