
My 12 month old auto darkening welding mask stopped auto darkening.
It has a small PVcell (amorphous) on the front and a rechargeable (!) battery.
I keep it in the box it came in to reduce dust and scratches.
The battery went flat and it wouldn't wake up so I saw stars !
Half an hour out in the sun and it has recharged and works fine again.
Lesson.... don't treat your auto mask like a toadstool and keep it in the dark.
