Thanks for sharing that information, bro. Rounded corners of plates - interesting.
If I remember my Physics correctly,- and assuming everything else equal, the longevity and power of the battery is directly proportional to the area of the plates.
Rounded corners to improve efficiency and productivity in the shop[production] floor? Too far-fetched in my limited experience.
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Yes bro. Sharper corners means more surface area. Rounded corners means the plates have already been worn down by acid. The seller told me that brand might have been reusing plates from old batteries.