Bad battery cells

[rob71]

My Strbd. bank (house, Strbd. start) showed low. Upon testing I found 2 very bad cells. Did not register at all.
1 each located adjacent to the negative terminals. All others were very good.
Is this an indication of grounding or other problems?
Capt. Rob

 

[Boatsb]

We're the cells dry?

Did they need more water than others?

What is the battery type? I'm guessing 12 volt.

 

[rob71]

12 volt 8D wet cells. About three yrs. old
Water was fine in all.

 

[Boatsb]

3 or 4 years is about right especially with a standard charger.

 

[rob71]

Thanks Scott.
I just thought it strange that the failed cells were only the 2 next to the ground terminals.
I will clean everything up and replace.