最后，有人可能警告过你，便宜的第三方充电器会毁掉你的手机。这有部分是真的：很多充电器——特别是在网上出售的便宜样机，甚至是本地购物中心小摊里卖的充电器——做工很糟，或者使用质量低劣的元件。质量差的充电器不仅会弄坏你的手机，而且还会漏电，让你受伤。所以如果要更换充电器，或多买一个备用，一定要选择可靠的生产厂家。

Finally, you may see warnings that a cheap third-party charger could damage your phone. There’s some truth here: Many chargers — especially budget models sold online, or even at your local shopping mall kiosk — are poorly made, or use low-quality components. A poorly made charger can not only damage your phone, but could also hurt you by exposing you to dangerous currents. So if you’re replacing your phone’s AC adapter, or buying an extra, stick with a reputable vendor.