There are also those Chinese-made penlight batteries (yung kamukha ng Energizer, pero iba yung tatak) that get completely drained after only a few minutes of operation.

The Chinese should have researched what happened to the American Factories in early 1900's and their reputation in those times.
oldblue,

Absent yata ako nung tinuro ito sa school. What was the reputation of US factories in the early 1900s?