Amazon.com: Customer reviews: MEGSUN 18V 12V 18W Solar Car Power Battery Charger, Portable Solar Panel Trickle Charger with Cigarette Lighter Plug, Suction Cups, Maintainer for Automobile Motorcycle Boat
Amazon calculates a product’s star ratings based on a machine learned model instead of a raw data average. The model takes into account factors including the age of a rating, whether the ratings are from verified purchasers, and factors that establish reviewer trustworthiness.
I used the solar battery charger and my car was dead the next day. The company asked me to remove my negative review because they were no longer going to sell the solar car battery charger. They also said they were going to give me a refund. They did neither.