NTT DoCoMo開發出了能夠利用太陽能電池發電的手機充電器，并且(qie)在“CEATEC JAPAN 2009（圖1，圖2）。該充電(dian)(dian)器的(de)最大(da)輸出電(dian)(dian)流約(yue)為(wei)300mA，在日照良(liang)好的(de)場所只(zhi)需3～5小時即可(ke)充滿(man)手(shou)機的(de)鋰離子充電(dian)(dian)電(dian)(dian)池。外形尺(chi)寸為(wei)114mm×146mm×15mm。

　　除太(tai)陽(yang)能(neng)(neng)電(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)外(wai)，NTT DoCoMo還(huan)開(kai)發出了暫時儲存太(tai)陽(yang)能(neng)(neng)電(dian)(dian)(dian)(dian)(dian)池(chi)生成電(dian)(dian)(dian)(dian)(dian)量的“輔(fu)助(zhu)(zhu)充(chong)電(dian)(dian)(dian)(dian)(dian)適(shi)配(pei)(pei)(pei)器(qi)(qi)”（圖(tu)3）。通(tong)過與太(tai)陽(yang)能(neng)(neng)電(dian)(dian)(dian)(dian)(dian)池(chi)充(chong)電(dian)(dian)(dian)(dian)(dian)器(qi)(qi)組合(he)使(shi)用(yong)，白天太(tai)陽(yang)能(neng)(neng)電(dian)(dian)(dian)(dian)(dian)池(chi)產生的電(dian)(dian)(dian)(dian)(dian)量可以存儲在輔(fu)助(zhu)(zhu)充(chong)電(dian)(dian)(dian)(dian)(dian)適(shi)配(pei)(pei)(pei)器(qi)(qi)中，在夜間通(tong)過輔(fu)助(zhu)(zhu)充(chong)電(dian)(dian)(dian)(dian)(dian)適(shi)配(pei)(pei)(pei)器(qi)(qi)為手機充(chong)電(dian)(dian)(dian)(dian)(dian)。“完全無需(xu)插(cha)頭即(ji)可使(shi)用(yong)手機”（NTT DoCoMo解說員）。輔(fu)助(zhu)(zhu)充(chong)電(dian)(dian)(dian)(dian)(dian)適(shi)配(pei)(pei)(pei)器(qi)(qi)的電(dian)(dian)(dian)(dian)(dian)流(liu)容量約為1800mAh，對于800mAh左右的手機充(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)池(chi)，“可以充(chong)滿1次半左右”（同(tong)上(shang)）。輔(fu)助(zhu)(zhu)充(chong)電(dian)(dian)(dian)(dian)(dian)適(shi)配(pei)(pei)(pei)器(qi)(qi)的外(wai)殼上(shang)標注有“Powered by eneloop”的字樣，由此可以推測，其內置充(chong)電(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)池(chi)應(ying)該(gai)是三洋電(dian)(dian)(dian)(dian)(dian)機的eneloop品牌(pai)。

　　太陽(yang)能電(dian)池充電(dian)器采用美國SunPower太陽(yang)能電(dian)池單(dan)元(yuan)并聯的(de)(de)結構。模塊(kuai)為NTT電(dian)子制造，組合了使用DC-DC轉換器的(de)(de)升壓電(dian)路，以及具備“MPPT（Maximum Power Point Tracking）”功能，能夠按照日照條件控制輸(shu)出(chu)功率(lv)達(da)到最大化的(de)(de)IC。借(jie)助這一(yi)結構，“即使部分單(dan)元(yuan)位于(yu)陰影(ying)中，輸(shu)出(chu)功率(lv)也不會大幅下降”（同上）。

圖1：NTT DoCoMo展出的太陽能電池充電器

圖(tu)2：太陽能電池充電器的概(gai)要

圖3：與太(tai)陽能(neng)電(dian)池(chi)充(chong)電(dian)器組合使用(yong)的輔助充(chong)電(dian)適配器