I have had a problem with my power sounder and rather then replacing the unit as funds are short this time of year i thought i would get it fixed.

I bought the batteries from cell pack solutions (not many left) and very good service.

I opened the power sounder to find the completly different batteries looking at me the ones on the power sounder have 4 prongs and the ones i have bought just have three?

The new batteries

has any one fixed one of these before if so have i bought the wrong ones or is there away of getting round it?

any advice welcome.