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2005 Ford F250 battery can’t maintain a charge

Having problem maintaining a charge on the battery. Have tested the battery and it is good. It still won’t start after registering " fully charged". Will not start!!!

Not if this part of your post is also true;

How do you know it is fully charged and how do you know it can deliver the cranking amps you need?

Also, by “Will not start” do you mean it won’t crank? Or it cranks and won’t start?

It would also be useful to know which engine, how many miles on it, how old is the battery, and any other detail you failed to put into your first post. Post back and we’ll try and help.

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