Any 'own brand' cordless tools especially anything with a Sealey badge on it.................fairly expensive impact gun went through 6 batteries and 3 chargers in 3 years (binned the lot in the end) the Sealey 4 1/2" mains angle grinder snapped its output shaft the first time it was used .
Any power tools from Machine Mart with a Clarke name badge on it , self destructing angle grinders, radom orbital sander and electric power file.
As for cordless drills have tried the lot from Bosch through DeWalt before eventually discovering that Makita ones actually work well and continue to function for years and years (touch wood)