![]() Hover over the green button or click and hold it you’ll see a series of. And 100 percent isn’t really “100 percent.” It’s the maximum that a battery’s controlling circuitry or connected operating system believes it can safely hold when “full. From the top left of your window, find the red, yellow, and green buttons. If you ever wondered why your devices charge very fast and then very slowly, that’s why. That’s why battery circuitry on all devices throttles charging speed from 80 to 100 percent. ![]() After that point, it’s easy for the batteries to overheat, which can damage them or, in the worst case, cause bulging or even fires. Li-ion batteries are excellent at charging and discharging in varying amounts over time and losing relatively little charge when idle for long periods.īut the way in which they store energy requires careful charging past about 80 percent capacity. ![]() Even the later nickel-metal hydride (NiMH) batteries required a regular full discharge-taking the battery down to no stored capacity-to keep them in good shape. Lithium-ion batteries are a far sight better than their nickel-based predecessors.
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