The cloudy electrolyte indicated that cell is sulphated and that battery is DOA. All cells should charge at approximately the same rate, as indicated by the specific gravity reading. It sounds like both batteries should be replaced.Sorry!
When my 23U was delivered, both batteries were sulphated (all cells showed cloudy electrolyte) and I contacted the battery manufacturer, who denied the claim stating that the batteries had been drained and left uncharged at Thor. (He had had several similar complaints.)With some effort, and a convincing technical argument, Thor paid for a new set.
Originally Posted by JGallagher
After 4 hours of charging, ONE cell out of 12 tested good with the hydrometer.
I knew that batteries were done but just had to confirm it to myself.
Strangely, the acid in one of the cells was brownish, almost muddy. The rest were clear.
Thanks again for all of the helpful replies.