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That's true, but I wouldn't call the effect drastic (as long as you stay in normal voltage ranges). For example, your link says that 100% depth of discharge lasts 300-500 cycles, 50% lasts 1,200-1,500 cyles, 25% lasts 2,000-2,500 cycles, and 10% lasts 3,750-4,700 cycles. You might think wow, 3,750-4,700! That's way more cycles than the 300-500 of a 100% discharge cycle! This is true, but usually the important comparison is total kWh stored, not total cycles. Each cycle of a 100% loop is 10x more valuable than a discharge of a 10% loop. So the proper comparison is not 3,750-4,750 vs 300-500, it's 3,750 vs 3,000-5,000. So the shallow discharge cycle comes out on top, but not by a huge margin. Compounding this is the fact that lithium ion batteries are always losing capacity while being stored at room temperature. So this is another advantage of deeper cycling of batteries. You get more value out before they age. Anyway, you likely knew this, but I thought I would share in case it was educational for others. |