eLearning, E-learning, E-Learning or e-Learning?

Personally, eLearning doesn't make sense. :) Seems it should be e-learning or elearning.

I use E-Learning in headings because it looks odd to not have the hypen with the big E small l. 

• 10 Best Elearning Tips vs 10 Best E-Learning Tips

But I use elearning in the body text.