We have a lot of lithium tags. We have lithium lithium-ion lithium-polymer lipo
It looks like we need to clean up lithium and check to see if there are any questions that are on just lithium and put the rest of the lithium tags into other categories. I suppose a lithium-metal tag could be created if needed.
lithium-polymer lipo should also be merged, since they are the same thing.
Also one thing that is really useful for looking at tags that need to be grouped is the related tags listed off to the right of the page when clicking on a tag: