Amazon calculates a product’s star ratings using a machine learned model instead of a raw data average. The machine learned model takes into account factors including: the age of a review, helpfulness votes by customers and whether the reviews are from verified purchases.
The product is an excellent organizer for charged and dead batteries. Dead batteries go into the dead battery compartments and charged batteries go into the charged battery compartments. No more mix-up and the labeling of battery compartments is an excellent way of organizing.