If I explain something to someone and they don't understand, I usually think that it's my fault for not explaining it to them properly.. but I grant you that some people need an awful lot of explanation.
When this happens, it's usually because they have already made up their mind what the problem is, and consequently don't really think about or accept what you are saying. Here, the lad KNEW it was faulty before sending it back, so obviously it was not a problem with the battery…Those who have a little knowledge are often the greatest problem in this regard…
Edited By Dodgy Geezer on 27/01/2016 12:11:50