华为mate9 换为慢充的方法:
所谓快充就是充电头输出电流大是最主要条件,一般都是4A。你用其它手机2A充电头就慢一倍。
华为mate9连接电脑的方法:
点击手机桌面【设置】图标,~然后拉到手机屏幕最下方,点击【关于手机】
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/ac345982b2b7d0a23a0c1e59c0ef76094a369a28?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
找到【版本号】,然后用手不断快速点击【版本号】
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/faf2b2119313b07e22cc16cc07d7912396dd8c85?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
直到出现如下图的【您现在处于开发者模式】提示,说明您已经开启了开发人员模式了。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/1b4c510fd9f9d72ab17056d9df2a2834359bbbda?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
然后返回到【设置】页面,您就可以看到如图的【开发人员选项】了。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/09fa513d269759ee8846260fb9fb43166c22dfe4?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
接着进入【开发者选项】,把【开发人员选项】开关拉开,再开启【USB 调试】选项。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/810a19d8bc3eb13503aef17fad1ea8d3fc1f448c?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)
点击【开发人员选项】和【USB 调试】后,会弹出一个小窗口,请点击【确定】这样你的手机就可以连接上电脑了。
![](https://video.ask-data.xyz/img.php?b=https://iknow-pic.cdn.bcebos.com/2934349b033b5bb511f6663a3dd3d539b700bcd5?x-bce-process=image%2Fresize%2Cm_lfit%2Cw_600%2Ch_800%2Climit_1%2Fquality%2Cq_85%2Fformat%2Cf_auto)