“sub 3” is nothing* compared to battery acid. Note that ±1 pH is a difference of 10x. here pH over concentration, note the graph ends at ~10 %, which is 1/3 of battery acid, but is already below pH 0.
*Yes, technically every value below 3 is included in “sub 3”. But making an upper limit that is a more than 1’000x lower concentration is absurd.
“sub 3” is nothing* compared to battery acid. Note that ±1 pH is a difference of 10x. here pH over concentration, note the graph ends at ~10 %, which is 1/3 of battery acid, but is already below pH 0.
*Yes, technically every value below 3 is included in “sub 3”. But making an upper limit that is a more than 1’000x lower concentration is absurd.