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.
This Battery tray fits perfectly in my draw so no need for a cover, and I like the fact I can easily find all my batteries in the one place. The battery tester works well, and its a good way to determine your battery life. Also arrived a week early. A good product at a reasonable price. It is wall mountable but I have not used this option.