怎樣選擇合適的充電器？
用戶選擇充電器時自然(ran)會有不同的(de)偏好，這里(li)的(de)建議(yi)著重(zhong)性能方面的(de)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)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)有關(guan)。充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)越(yue)(yue)大(da)(da)，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)速(su)度(du)越(yue)(yue)快。而充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)時間的(de)(de)長短除了和(he)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)速(su)度(du)有關(guan)，還要(yao)看電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)容量大(da)(da)小。需要(yao)注意的(de)(de)是，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)越(yue)(yue)大(da)(da)，對充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)和(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)內部體(ti)系設(she)計品(pin)質要(yao)求越(yue)(yue)高(gao)。一般情(qing)況下，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)越(yue)(yue)大(da)(da)，充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)過(guo)程中可能導致的(de)(de)發熱越(yue)(yue)多，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)的(de)(de)性能可能受到的(de)(de)損(sun)害(hai)越(yue)(yue)大(da)(da)。品(pin)質低(di)劣的(de)(de)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)器(qi)和(he)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)在(zai)大(da)(da)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)快速(su)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)時很容易出現(xian)漏液(ye)等安全性能方面(mian)的(de)(de)問題。

2. 充(chong)電(dian)(dian)效(xiao)率 充(chong)電(dian)(dian)時(shi)向電(dian)(dian)池(chi)輸入的(de)(de)(de)能(neng)量(liang)不是全部(bu)轉化為(wei)電(dian)(dian)池(chi)儲存的(de)(de)(de)能(neng)量(liang)，還有一(yi)部(bu)分是分別用于(yu)(yu)電(dian)(dian)池(chi)內部(bu)的(de)(de)(de)副反(fan)應和轉化為(wei)充(chong)電(dian)(dian)過程中的(de)(de)(de)熱量(liang)，所以充(chong)電(dian)(dian)效(xiao)率總是小于(yu)(yu)100%的(de)(de)(de)。充(chong)電(dian)(dian)時(shi)充(chong)電(dian)(dian)電(dian)(dian)流應控制在一(yi)定范圍(wei)內，充(chong)電(dian)(dian)電(dian)(dian)流太(tai)大或太(tai)小，都會降低充(chong)電(dian)(dian)效(xiao)率。對于(yu)(yu)大電(dian)(dian)流的(de)(de)(de)快速(su)充(chong)電(dian)(dian)器來說，還需要對充(chong)電(dian)(dian)器的(de)(de)(de)充(chong)電(dian)(dian)方(fang)式進行特(te)別的(de)(de)(de)設計，以便提(ti)高充(chong)電(dian)(dian)效(xiao)率。

3. 充電終止控制 小電流的充電器一(yi)般(ban)采用(yong)時間(jian)控制(zhi)(zhi)方(fang)(fang)式。大(da)電(dian)(dian)(dian)(dian)流的(de)(de)(de)快(kuai)速(su)充(chong)(chong)電(dian)(dian)(dian)(dian)器(qi)一(yi)般(ban)采用(yong)-△V控制(zhi)(zhi)和(he)其(qi)他(ta)控制(zhi)(zhi)方(fang)(fang)式相結合的(de)(de)(de)設計，智能(neng)化程度(du)要(yao)高(gao)一(yi)些(xie)。 充(chong)(chong)電(dian)(dian)(dian)(dian)器(qi)提供的(de)(de)(de)電(dian)(dian)(dian)(dian)流越大(da)，充(chong)(chong)電(dian)(dian)(dian)(dian)終止(zhi)控制(zhi)(zhi)方(fang)(fang)式越復雜，成本和(he)價(jia)格越高(gao)。對(dui)于用(yong)戶來說，要(yao)依據自己的(de)(de)(de)實際情(qing)況(kuang)來進(jin)行選(xuan)擇(ze)。如果(guo)使用(yong)的(de)(de)(de)電(dian)(dian)(dian)(dian)池容(rong)(rong)量不(bu)是很高(gao)，或者(zhe)對(dui)充(chong)(chong)電(dian)(dian)(dian)(dian)速(su)度(du)并不(bu)特別看重，就可(ke)以選(xuan)擇(ze)普通的(de)(de)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)器(qi)；如果(guo)有必要(yao)選(xuan)擇(ze)價(jia)格較高(gao)的(de)(de)(de)快(kuai)速(su)充(chong)(chong)電(dian)(dian)(dian)(dian)器(qi)，最好對(dui)充(chong)(chong)電(dian)(dian)(dian)(dian)器(qi)和(he)電(dian)(dian)(dian)(dian)池的(de)(de)(de)性(xing)能(neng)多(duo)進(jin)行一(yi)些(xie)了(le)解。比如，可(ke)以提供1000mA最大(da)充(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)流的(de)(de)(de)充(chong)(chong)電(dian)(dian)(dian)(dian)器(qi)，用(yong)來給600mAh容(rong)(rong)量的(de)(de)(de)鎳(nie)氫電(dian)(dian)(dian)(dian)池充(chong)(chong)電(dian)(dian)(dian)(dian)，就需要(yao)電(dian)(dian)(dian)(dian)池是專門(men)設計的(de)(de)(de)適合大(da)電(dian)(dian)(dian)(dian)流充(chong)(chong)電(dian)(dian)(dian)(dian)的(de)(de)(de)電(dian)(dian)(dian)(dian)池，或者(zhe)要(yao)保證充(chong)(chong)電(dian)(dian)(dian)(dian)器(qi)可(ke)以提供更(geng)小的(de)(de)(de)電(dian)(dian)(dian)(dian)流選(xuan)擇(ze)。