怎樣選擇合適的充電器？
用戶選擇充電器時(shi)自然會有不同的偏好，這里的建議著重性能方(fang)面的選擇。

1. 充電速度。 常見的充電器采用恒流充電方式，充電速度主要和充電器提供(gong)的(de)(de)(de)電(dian)(dian)(dian)(dian)流(liu)(liu)有關。充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)(liu)越(yue)(yue)大，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)速度(du)越(yue)(yue)快。而充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時間(jian)的(de)(de)(de)長(chang)短除了和充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)速度(du)有關，還(huan)要看電(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)容量大小。需要注意的(de)(de)(de)是，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)(liu)越(yue)(yue)大，對充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)器(qi)和電(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)內部(bu)體系(xi)設(she)計品質(zhi)要求越(yue)(yue)高(gao)。一般(ban)情況下，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流(liu)(liu)越(yue)(yue)大，充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)過程中可(ke)(ke)能(neng)導致的(de)(de)(de)發熱(re)越(yue)(yue)多，電(dian)(dian)(dian)(dian)池(chi)的(de)(de)(de)性能(neng)可(ke)(ke)能(neng)受到的(de)(de)(de)損(sun)害(hai)越(yue)(yue)大。品質(zhi)低劣的(de)(de)(de)充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)器(qi)和電(dian)(dian)(dian)(dian)池(chi)在大電(dian)(dian)(dian)(dian)流(liu)(liu)快速充(chong)(chong)(chong)(chong)電(dian)(dian)(dian)(dian)時很(hen)容易出(chu)現(xian)漏液等(deng)安全性能(neng)方面(mian)的(de)(de)(de)問題。

2. 充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)率 充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)時向電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池輸入(ru)的(de)(de)(de)能量(liang)不是(shi)全部轉化(hua)為電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池儲存的(de)(de)(de)能量(liang)，還有一部分是(shi)分別用于電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池內(nei)部的(de)(de)(de)副反應和轉化(hua)為充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)過程中的(de)(de)(de)熱(re)量(liang)，所以充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)率總(zong)是(shi)小于100%的(de)(de)(de)。充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)時充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流應控制在一定范圍(wei)內(nei)，充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流太(tai)大或太(tai)小，都(dou)會降低(di)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)率。對于大電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流的(de)(de)(de)快速(su)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)來說，還需要對充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)的(de)(de)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)方式進行(xing)特別的(de)(de)(de)設計，以便提高充(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)效(xiao)率。

3. 充電終止控制 小電流的充電器一(yi)般采用(yong)時間控(kong)制方式。大電(dian)(dian)(dian)流的(de)(de)(de)快速充(chong)電(dian)(dian)(dian)器(qi)(qi)(qi)一(yi)般采用(yong)-△V控(kong)制和其他控(kong)制方式相結合(he)的(de)(de)(de)設(she)計，智(zhi)能(neng)化程度要(yao)(yao)(yao)高(gao)(gao)一(yi)些(xie)。 充(chong)電(dian)(dian)(dian)器(qi)(qi)(qi)提(ti)供的(de)(de)(de)電(dian)(dian)(dian)流越大，充(chong)電(dian)(dian)(dian)終止控(kong)制方式越復雜，成本(ben)和價(jia)格越高(gao)(gao)。對(dui)于用(yong)戶來(lai)(lai)(lai)說，要(yao)(yao)(yao)依據(ju)自(zi)己的(de)(de)(de)實(shi)際情況來(lai)(lai)(lai)進行選(xuan)(xuan)擇(ze)。如果使用(yong)的(de)(de)(de)電(dian)(dian)(dian)池容量(liang)不是很高(gao)(gao)，或者對(dui)充(chong)電(dian)(dian)(dian)速度并不特別看重，就可(ke)以(yi)選(xuan)(xuan)擇(ze)普(pu)通(tong)的(de)(de)(de)充(chong)電(dian)(dian)(dian)器(qi)(qi)(qi)；如果有必要(yao)(yao)(yao)選(xuan)(xuan)擇(ze)價(jia)格較(jiao)高(gao)(gao)的(de)(de)(de)快速充(chong)電(dian)(dian)(dian)器(qi)(qi)(qi)，最好對(dui)充(chong)電(dian)(dian)(dian)器(qi)(qi)(qi)和電(dian)(dian)(dian)池的(de)(de)(de)性能(neng)多進行一(yi)些(xie)了解。比如，可(ke)以(yi)提(ti)供1000mA最大充(chong)電(dian)(dian)(dian)電(dian)(dian)(dian)流的(de)(de)(de)充(chong)電(dian)(dian)(dian)器(qi)(qi)(qi)，用(yong)來(lai)(lai)(lai)給(gei)600mAh容量(liang)的(de)(de)(de)鎳氫電(dian)(dian)(dian)池充(chong)電(dian)(dian)(dian)，就需要(yao)(yao)(yao)電(dian)(dian)(dian)池是專門設(she)計的(de)(de)(de)適合(he)大電(dian)(dian)(dian)流充(chong)電(dian)(dian)(dian)的(de)(de)(de)電(dian)(dian)(dian)池，或者要(yao)(yao)(yao)保證充(chong)電(dian)(dian)(dian)器(qi)(qi)(qi)可(ke)以(yi)提(ti)供更小的(de)(de)(de)電(dian)(dian)(dian)流選(xuan)(xuan)擇(ze)。