I just bought brand new trolling motor batteries for my boat in late February. Yesterday my buddy gave me a set of three batteries from his boat that he no longer needed. The batteries from his boat were installed in the fall and use less than 5 times.
So my question is how long will the barely used batteries last? If I just keep them charged and store them in my garage will they be useful in 2 years? Or should I just try to sell them?