Electroluminsecent display in Hocking Phasec 2200 Eddy current instrument

[Jwalling]

My first guess that is this is screen burn, but it's much more apparent on the right-hand side of the display. I would expect it to be more uniform. I've pretty much no experience with these - is it repairable or does it need to be replaced?

Haven't pulled it apart yet to get a part #.

[Jwalling]

Digging further to see what else needs doing, I found a battery. But not just any battery! 

I removed the white powder (leaking of course). OK, I can understand a two cell stacked battery, but these are obviously different capacities. I think they are Ni-Cad.

Is this custom made? Never seen anything like this...

May have to use an external pack with two cells as clearance to the next board up is very tight.
 

[Armadillo]

From the dimension, looks like a CR2020 + CR2040. Funny combination of different mAH. Got to be self made, judging from the poor soldering of the tap.

In which case, might as well be CR2020 + CR2020 of same mAH and save 2mm height.

[Jwalling]

From the dimension, looks like a CR2020 + CR2040. Funny combination of different mAH. Got to be self made, judging from the poor soldering of the tap.

In which case, might as well be CR2020 + CR2020 of same mAH and save 2mm height.

I think that they're Ni-Cad, not lithium.

[Armadillo]

I think that they're Ni-Cad, not lithium.

Oh yes, you are right. This odd looking shape is in-fact NiCad battery, thanks.