Update on the Nduun Auto Darkening Welding Lens

About a year ago I replaced the lens in my Harbor Freight Chicago Electric welding helmet, Item # 91214.
The new lens was obtained from Amazon from a company called Nduun. It worked good the first day. A few months later it wasn't working. The battery is fine, the lens has some other problem.

Please see My Welding Helmet Almost Blinded Me!
https://www.youtube.com/watch?v=Y9UrPN9L7Zw

And: Replacing the Batteries on a Harbor Freight Welding Helmet
https://www.youtube.com/watch?v=SUhme2QU4t0