Im like most of the other guy's that run the everstarts they last about 4 seasons....you cant just charge them and expect them to live. Maintain them,add distilled water every 2 or 3 charges(not tap water) charge them as soon as possible after using them.When buying them look on the side of the battery there is a mfg date buy the newest one you can in the store. If your batteries last 2,3,4 or more years think of how much you've fished, deep cycle battery life is not rated in years it's life span is rated in discharges the more you run it down and bring it back the sooner it dies,if you dont maintain it it dies that much quicker.