It varies with the size of the battery. They do not all weigh the same.
Unless the old battery has lost some of its fluid; both old and new batteries should weigh the same.
Not all mechanical pencils have 2B or B lead. Some pencils have bigger lead.
#2 wooden pencils vary by the type of wood used, from 6 to 10 grams each (0.2 to 0.3 ounces). I just individually weighed 8 unused old-fashioned wooden pencils. All were unsharpened and had unused erasers. They were all about 7½" long. Some were round, some were hexagonal. I used a digital scale accurate to 0.01 ounces. The weights ranged from 0.17 ounces to 0.22 ounces. Total weight of all eight pencils was 1.56 ounces, giving an average of 0.195 oz. Since all pencils had been stored in the same container, we can assume all had the same moisture content, so the small differences are explained by variances in the density of the type of wood used.
Probably Yes , the two are one in the same despite having different names .
Probably the same people who make the pencils.
well it depends on how many pounds of each but they both weigh the same
6
they would weigh the same everywhere
1000
the same as your brain
Depends on the battery. They are not all the same. It depends on the battery , a BCI group size 65 battery is rated at 650 cold cranking amps