I have a cheap and cheerful welding mask, I noticed recently, i'll start welding, it'll darken but it won't then lighten back up so I can't see what i'm doing. It stays really dark, I can see the weld but not where i'm going. There is an adjuster on the side but it makes no difference.
Is this what they do if the battery needs replacing?
Is this what they do if the battery needs replacing?