褒贬不一 无线充电手机是实用还是鸡肋？
经过多年研究探索，目前无线充电已经被应用于智能家居、智能穿戴、医疗设备等多个领域，而像智能手机这样的大众消费电子产品自然是一马当先。
如今人们对于智能手机的依赖愈发严重，智能机的发展也是突飞猛进，但是无论系统如何升级，外观如何美观，APP如何方便生活，电池的续航能力始终是一个无法解决的问题。有时我们不得不边充电边使用手机，而USB线的束缚就让人非常焦躁。于是手机无线充电技术应运而生。
虽然诺基亚和三星早在几年前就推出了支持无线充电的手机，但直到去年苹果宣布iPhone 8/X采用无线充电功能之后，无线充电才真正迎来市场的关注和发展。在iPhone X的引领下，国内外的几大厂商也陆续开始跟进，如小米MIX 2S、华为Mate RS、索尼Xperia XZ2、金立M7 Plus、三星的S8和Note 8等等，有的甚至还搭载了无线快充技术。相关数据显示，WPC无线充电联盟最新Qi认证的手机数目多达60款，越来越多的手机开始支持无线充电功能。
那么相比传统的数据线充电，无线充电到底好在哪里呢？
首先，无线充电的最大优势就是方便，随手将手机置于无线充电座上即可充电，省略多余步骤。其次，使用无线充电器可以避免数据线的反复插拔，对手机的损耗更小，一定程度上延长了手机使用寿命；同时办公桌上线材杂乱的情景也将消失不见。另外，无线充电比有线充电要更安全，没有了外露的连接器，漏电、跑电等安全隐患都可以避免。最后，无线充电不需要占用手机的耳机接口，在给取消了耳机接口的手机充电时，可以戴上耳机享受美妙音乐。
不过就像我们看到的那样，当前所谓的手机无线充电必须将手机放在无线充电底座上面，无线充电板仍需有线连接，那么无线和有线其实就没什么区别了。虽然市面上有几款充电器宣称可以无需接触底座充电，但实际距离与接触式充电差别不大。再有就是无线充电速度相对较慢，目前市面上见到的大多数普通充电板支持的都是5W的充电功率，即使是快充的无线充电板也就是7.5W或者10W的水平，这与市面上主流的18W有线快速充电技术还是有非常大的差距。
尽管目前看来，现阶段的手机无线充电实际意义并不是很大。但从客观上来说，无线充电确实是近两年手机发展的潮流趋势，未来高端旗舰手机应该都会标配这一技术。另外无线充电目前的缺点，也是可以通过技术创新的手段来规避的。根据报道，目前已经有公司实现了磁共振的无线充电技术，它的特点就是能够在半米内进行无线充电，同时充电功率可以大大提高，相信不久的将来就会用到手机上。
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