We have two tags, lithium and lipo. Now an edit to the first suggests that lithium batteries are disposable and non-rechargeable batteries, unlike LiPo ones. It seems a valid argument to have separate tags, but all the questions with that tag are about LiPo batteries.
A lithium coin cell and a Li-Ion battery (such as Li-Poly) are two separate things and should not be tagged the same.
But it's hard for me to care much, since tags are so poorly deployed on this site.