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What Happens When You Charge a Battery
给电池充电时发生了什么
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Electric current flows into the battery from a charger.电流从充电器流入电池。
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Inside, tiny particles move and store energy.电池内部，微小粒子移动并储存能量。
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Chemicals change form but stay inside the cell.化学物质形态改变，但始终留在电池内。
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No fuel burns and no gas escapes.无需燃烧燃料，也无气体逸出。
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Full charge means the battery holds max energy.充满电意味着电池储存了最大能量。
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Overcharging can damage older batteries.过度充电可能损坏老式电池。
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Modern phones stop charging when full.现代手机充满后会自动停止充电。
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Batteries let us use devices anywhere.电池让我们能随时随地使用设备。