当把U盘插入充电器接口时，接着充电，会不会发生有趣的事情呢？
USB接口即通用串行总线（英语：Universal Serial Bus，缩写：USB）是连接计算机系统与外部设备的一种串口总线标准，也是一种输入输出接口的技术规范，被广泛地应用于个人电脑和移动设备等信息通讯产品，并扩展至摄影器材、数字电视（机顶盒）、游戏机等其它相关领域。
红色－USB电源： VCC
白色－USB数据线：DATA-
绿色－USB数据线：DATA+
黑色－地线： GND
从上图可以看出，USB接口4根线其中两根为电源线，两外两根为数据线，所以USB接口的作用不仅是通讯还有给外设供电，而且供电和通讯是完全分开的。
当U盘插入电脑等设备，首先完成为U盘供电（USB标准电压5V）,紧接着开始通讯，此时电脑便可以读出U盘的数据。
再来看充电器，最早的USB口充电器都是采用5V标准电压输出，所以充电器接口中其实只有两根供电线起作用，而两根数据线为空。近年来各种快充技术的发展，促使了充电器也变的智能起来，所以现在的充电器接口中的数据接口也是有作用的，至于它是怎么作用的我们先来看看快充技术，各个厂家的快充技术本质上讲就两种，一种是提高电压，另一种则是提高电流，通过提高电压或提高电流来提高充电瓦数，从而达到快充目的。
但是不论是提高电压还是电流的充电器它们都是具备向下兼容功能，这就是我们平常看到的充电器参数[5V2A,9V1.5A,12V1.5A]或者[5V2A,5V3A,5V5A]这样的字样，那么当充电器与用电设备连通后是充电器采用多大电压或多大电流来供电呢？这时候充电器的数据接口就有用了。
简单点说，当用电器接入充电器后，充电器先以最低标准供电，然后再通过数据接口与设备沟通获取设备信息，设备返回信息给充电器，如果返回信息支持9V那么充电器就将电压切换为9V供电，如果支持12V那么充电器就切到12V,如果没有获取到支持更高标准的信息，那么就一直保持标准电压供电，提高电流的方式也是同样道理。
所以，U盘插入充电器后，充电器只会按标准电压给U盘供电而已，就如同你将U盘插入电脑却没有去看它，所以不会发生任何事情。
{"weixin":{"label":"微信","name":"weixin","selected":true,"value":true,"sortid":"1","shareid":"weixin","sharetitle":"分享到微信","event":"shareToWeiXin","lang":"shareWeb_WeiXin"},"copy":{"label":"复制网址","name":"copy","selected":true,"value":true,"sortid":"2","shareid":"copy","sharetitle":"复制网址","event":"copy_url","lang":"shareWeb_Copy"},"qq":{"label":"QQ好友","name":"qq","selected":true,"value":false,"sortid":"1","shareid":"qq","sharetitle":"分享到QQ","event":"shareToQQ","lang":"shareWeb_QQ"},"sina_weibo":{"label":"新浪微博","name":"sina_weibo","selected":true,"value":true,"sortid":"4","shareid":"sina_weibo","sharetitle":"分享到新浪微博","event":"shareToSinaWB","lang":"shareWeb_SinaWeiBo"},"qq_zone":{"label":"QQ空间","name":"qq_zone","selected":true,"value":true,"sortid":"5","shareid":"qq_zone","sharetitle":"分享到QQ空间","event":"shareToQzone","lang":"shareWeb_QQZone"},"renren":{"label":"人人网","name":"renren","selected":true,"value":true,"sortid":"7","shareid":"renren","sharetitle":"分享到人人网","event":"shareToRenren","lang":"shareWeb_RenRen"},"douban":{"label":"豆瓣网","name":"douban","selected":true,"value":true,"sortid":"8","shareid":"douban","sharetitle":"分享到豆瓣网","event":"shareToDouban","lang":"shareWeb_DouBan"},"baidu_tieba":{"label":"百度贴吧","name":"baidu_tieba","selected":true,"value":true,"sortid":"10","shareid":"baidu_tieba","sharetitle":"分享到百度贴吧","event":"shareToTieba","lang":"shareWeb_TieBa"},"Facebook":{"label":"Facebook","name":"Facebook","selected":true,"value":true,"sortid":"11","shareid":"Facebook","sharetitle":"分享到FaceBook","event":"shareToFacebook","lang":"shareWeb_Facebook"},"Twitter":{"label":"Twitter","name":"Twitter","selected":true,"value":true,"sortid":"12","shareid":"Twitter","sharetitle":"分享到Twitter","event":"shareToTwitter","lang":"shareWeb_Twitter"},"LinkedIn":{"label":"LinkedIn","name":"LinkedIn","selected":true,"value":true,"sortid":"13","shareid":"LinkedIn","sharetitle":"分享到linkedIn","event":"shareToLinkedin","lang":"shareWeb_Linkedin"},"whatsapp":{"label":"whatsapp","name":"whatsapp","selected":true,"value":true,"sortid":"15","shareid":"whatsapp","sharetitle":"分享到whatsapp","event":"shareToWhatsapp","lang":"shareWeb_whatsapp"},"line":{"label":"line","name":"line","selected":true,"value":true,"sortid":"15","shareid":"line","sharetitle":"分享到line","event":"shareToLine","lang":"shareWeb_line"},"qq_weibo":{"label":"腾讯微博","name":"qq_weibo","selected":true,"value":true,"sortid":"3","shareid":"qq_weibo","sharetitle":"分享到腾讯微博","event":"shareToQQwb","lang":"shareWeb_QQWeiBo"},"peopleBlog":{"label":"人民微博","name":"propleBlog","selected":true,"value":true,"sortid":"14","shareid":"propleBlog","sharetitle":"分享到人民微博","event":"shareToPeopleBlog","lang":"shareWeb_peopleBlog"}}
