7號電池是屬于民用的圓柱形鋼殼小電池，電池的種類有好幾種，所以7號電池電(dian)(dian)壓多(duo)少V，主(zhu)要是(shi)看(kan)自己手上購買的(de)是(shi)哪種(zhong)類(lei)型(xing)的(de)電(dian)(dian)池(chi)，還有(you)其是(shi)否支持充電(dian)(dian)，同樣(yang)要看(kan)是(shi)屬于(yu)哪種(zhong)類(lei)型(xing)的(de)電(dian)(dian)池(chi)。7號電(dian)(dian)池(chi)尺寸規格是(shi)一(yi)(yi)個大小標準化了的(de)電(dian)(dian)池(chi)，國(guo)標又稱AAA型(xing)電(dian)(dian)池(chi)（7號電(dian)(dian)池(chi)/LR03/AM4）直徑10.5；高度(du)44.5mm，圓柱形(xing)電(dian)(dian)池(chi)；7號電(dian)(dian)池(chi)主(zhu)要有(you)聚合物鋰電(dian)(dian)池(chi)、磷(lin)酸鐵鋰電(dian)(dian)池(chi)、鎳氫電(dian)(dian)池(chi)和(he)干電(dian)(dian)池(chi)這幾種(zhong)。下面就具體(ti)看(kan)一(yi)(yi)下7號電(dian)(dian)池(chi)電(dian)(dian)壓多(duo)少V：

1、聚合物鋰離子電池做的7號電池標稱電壓是3.7V，有的是表4.2V，這個說法一般是按電芯來說的，其實一個7號電池就是一個電芯。其他(ta)更高電壓的，基本都是(shi)通過串(chuan)聯的方式來(lai)實(shi)現的。

2、磷酸鐵鋰離子電池做(zuo)的(de)7號(hao)電池標稱電壓是3.2V，也(ye)有3.65V高壓版的(de)，這(zhe)個(ge)也(ye)是按照一顆（1節電池）來(lai)說的(de)，也(ye)就(jiu)是單顆電芯的(de)電壓。

3、鎳氫電池做的7號電池標稱電壓是1.2V，是對單節電芯的標稱，目前國內的統一標準電壓也是1.2V。日常使用的1.2V鎳氫電池，其(qi)充滿電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)通常為1.4V，放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)終止電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)是(shi)0.9V。這就意味著，鎳氫(qing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)在(zai)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)到0.9V時(shi)已經不便使用，應(ying)該充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)了。因此，0.9V既是(shi)放(fang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)的終止電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，也可以(yi)看作是(shi)鎳氫(qing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)的起始電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)。實(shi)用中，因為0.9V之后的鎳氫(qing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)還有一些小電(dian)(dian)(dian)(dian)(dian)(dian)(dian)流存(cun)在(zai)，所以(yi)，有的鎳氫(qing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)將起始電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)設置為0.8V也是(shi)可行的。鎳氫(qing)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)充滿后的電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)在(zai)1.4V左右(you)，這可以(yi)視為其(qi)最高電(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)，但個(ge)體電(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)也要視具體充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)方式而定(ding)。

4、干電池(chi)做(zuo)的(de)(de)7號電池(chi)標(biao)稱電壓(ya)是(shi)1.5V，是(shi)比較早出現的(de)(de)電池(chi)，材料(liao)性質(zhi)與以前老(lao)式電筒使用的(de)(de)電池(chi)差不多。

7號電(dian)(dian)池(chi)能否充(chong)電(dian)(dian)在于生產時是(shi)(shi)定位其可否充(chong)電(dian)(dian)，現在的(de)(de)(de)電(dian)(dian)池(chi)基(ji)(ji)本(ben)上都是(shi)(shi)二次(ci)電(dian)(dian)池(chi)，也就是(shi)(shi)可充(chong)電(dian)(dian)電(dian)(dian)池(chi)，很(hen)少是(shi)(shi)一次(ci)性(xing)電(dian)(dian)池(chi)。因此目前大多數的(de)(de)(de)7號電(dian)(dian)池(chi)是(shi)(shi)可充(chong)電(dian)(dian)的(de)(de)(de)。當然(ran)，7號電(dian)(dian)池(chi)可否充(chong)電(dian)(dian)，還是(shi)(shi)看其用(yong)途和說明的(de)(de)(de)。想平(ping)常使用(yong)的(de)(de)(de)遙控電(dian)(dian)池(chi)這些，基(ji)(ji)本(ben)是(shi)(shi)不可充(chong)電(dian)(dian)的(de)(de)(de)。