100% Batteries... no start... then 25% Batteries

[fatfisherman]

I have an 97 7.3. This past Sunday I went out and tried to start it and nothing... sounded like dead batteries. I checked the batteries by plugging in a charger, both were around 25%

I charged both batteries to 100% over the last 30 hours, I tried to start it, and same thing... just a "click". Strange thing... I then checked the levels of the batteries right after trying to start it, and they were back down around 25%... is this even possible?

Thanks guys!

[GregsSD]

Yes it's possible, the batteries are shot!

Take them somewhere that has a load tester to properly test them so you know for sure. I have had batteries in the past that did the same thing when their time was up.

[fatfisherman]

Went at got the batteries load tested and they came back 100%. Tech suggested the starter may be dead...

Can someone direct me how to test this starter?

Cheers!

[sgg93]

If the starter is shorted to ground, it will usually fry the negative battery cable. It will however, produce a click similar to what you are hearing.