[time-nuts] US 5065A standby battery cell source?

[Dan Rae]

All this discussion of the excellence of these Rb units reminds me that 
another cell must have died in my battery pack since the slightest 
glitch in the power here now makes the green light go out.  The last 
time a cell died I just took it out since it actually seems to work well 
enough with 20 instead of the specified 21, but another one seems to 
have gone high resistance.

So, my question is: where might be a good place in the US to get tabbed 
NiMH AA cells to replace the battery in mine?   I am currently using 
generic Chinese ones, but am not at all happy with their longevity.

And this one came from eBay, quite a bit less than $500 because it 
looked filthy, but it took a lot of patience to find it and a bit of TLC 
to get it going, but it has been working superbly for about four years now.

Dan