If you purchase digital weighing scales that are wrong.. could changing the battery fix them?

I think the seller is probably taking the pxxx but thought I'd ask anyway as I only think I'm 98 percent chance of being right. The body weight scales came with 2 sealed carbon batteries. The scales told me I weigh around 3 stone less than I do and that my kitten weighs 3 stone(28lb) I've been told... show more I think the seller is probably taking the pxxx but thought I'd ask anyway as I only think I'm 98 percent chance of being right.

The body weight scales came with 2 sealed carbon batteries. The scales told me I weigh around 3 stone less than I do and that my kitten weighs 3 stone(28lb)

I've been told to change the batteries as it might fix it...?
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