I do have the Manker E11 for a while and the only issue I had with it was concerning the battery, as it doesn’t have reverse polarity protection and I let a 14500 battery upside down. Therefore, was not a flashlight issue, but a user’s issue!
I do like the light a lot, and never had any problem with it! Also, this Manker vs Klarus was my initial dillema.
The UI, the built quality and even the price made me opt for the Manker.
I guess that being 3 similar form lights, the Manker E11, Utorch UT01 and Lumintop EDC05, they certainly behave differently and so far, from these 3 models, the Manker seems to be the one to perform better.
I don’t have any Zebralight experience, so I can’t pronnounce on that!