On Mon, 19 Sep 2011 21:10:09 -0700, JR North
wrote:

I've had 2 HF a/d helmets for 6 years-never needed to replace the
batteries-yet. I remember the thread, but not the details. But, c'mon,
yer a smart guy, right? You don't really need to be shown, do you?
Hmmm?
JR
Dweller in the cellar

Actually mine hasn't quit yet. We had our first evening welding class
last night and one of the young guys mentioned that his HF autodark
helmet quit working. I told him I that I had seen a procedure
somewhere on the net describing replacement of some batteries inside
the one with a solar cell. I couldn't find it when I Googled last
night. I was hoping one of you guys might have saved it or the URL.

Knowing that it's repairable, I could probably muddle through and do
it on my own, but the voice of experience is always helpful rather
than having to reinvent the wheel.

RLW