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Lithium Battery Cycle Life: What the Number Means
Every lithium spec sheet leads with it: 3,000 cycles, 5,000 cycles, sometimes a lot more. Lithium battery cycle life is one of the most quoted numbers in the 12V world, and one of the least understood. It isn’t a promise of how many years your battery will last, and two batteries with the same figure can age very differently depending on how they were tested and how they’re used. So here’s what a cycle actually is, what the rating is measuring, and how to turn it into something useful: a realistic sense of how many years of touring, fishing or off-grid living your battery has in it.