Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Very Inconsistent

I had high hopes for this tester. I tested a batch of 6 AA cells which were at various levels of charge. I cleaned the contact ends of each cell with alcohol. If I tested a cell 6 times I would often get 3 or 4 different readings! It could read full cells pretty well but if a cell was at 40, 60 or 80% it would get the very inconsistent readings including regular 'dead' readings but the next reading would be 60% then 40%. I checked the cells first on two testers that I have been using reliably for a long time.