@temprano. When you look UNDER the comment block, you will find a menu that starts with: Simple Post Editor. Change that to Advanced Post Editor, and you will get a lot more possibilities to brighten up your input.
Or do as little old me: use ‘Simple’ and throw in the occasional blank line (2 returns in stead of 1 return).
As for the issue at hand: it may help us>you if we knew a bit more about the device you put the batteries in.