[seb1204]

What is a barbell you ask? The metal stick where you put on the weights each side in the gym. Had to look it up.

[jfk13]

Not to be confused with a barbel -- which is a fish.

[waste_monk]

Apparently the largest barbels can grow up to 10kg. So the battery is worth approximately two barbels.

It may have been more fitting to call the fish dumbbels.