When you go to Premium-PC-Steckernetzteil ("Rydges® High-Quality PC Netzteil – by OTB 2A – / 2000 mAh Ladegerät 5V 2000 mAh für Raspberry Pi Modell A und B & Banana Pi – Pi Model B+ (B Plus)" – I'm sorry, it's the German amazon website) you can see from the title it is about a power supply unit for raspberry pi. However, when you scroll down to the ratings / reviews it is clear that they are about cases for raspberry pi.
See the link for an image of the page. It is quite large, so I don't want to include it here directly.
Why did Amazon mess that up? Is it a bug?
Best Answer
An amazon user just send me the answer. Amazon seems to relate reviews to the "page", not the product. This makes perfect sense for T-Shirts which come in different sizes. Sadly, in this case the seller put different products on the same page (see image below). This means the reviews of all those different products get mixed.