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(chong)電器(qi)的最(zui)大(da)輸出電流(liu)約為(wei)300mA，在日(ri)照良好的場所(suo)只(zhi)需3～5小時即可充(chong)滿手(shou)機的鋰離子充(chong)電電池。外形尺寸(cun)為(wei)114mm×146mm×15mm。

　　除太(tai)陽(yang)能電(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)器外，NTT DoCoMo還(huan)開發出(chu)了暫(zan)時儲存(cun)太(tai)陽(yang)能電(dian)(dian)(dian)(dian)池(chi)(chi)生(sheng)成電(dian)(dian)(dian)(dian)量(liang)(liang)的(de)“輔(fu)(fu)助(zhu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)適(shi)配(pei)器”（圖3）。通(tong)過(guo)與太(tai)陽(yang)能電(dian)(dian)(dian)(dian)池(chi)(chi)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)器組合使用，白天太(tai)陽(yang)能電(dian)(dian)(dian)(dian)池(chi)(chi)產生(sheng)的(de)電(dian)(dian)(dian)(dian)量(liang)(liang)可(ke)以存(cun)儲在輔(fu)(fu)助(zhu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)適(shi)配(pei)器中，在夜間通(tong)過(guo)輔(fu)(fu)助(zhu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)適(shi)配(pei)器為手機(ji)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)。“完全(quan)無(wu)需(xu)插(cha)頭(tou)即可(ke)使用手機(ji)”（NTT DoCoMo解(jie)說員）。輔(fu)(fu)助(zhu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)適(shi)配(pei)器的(de)電(dian)(dian)(dian)(dian)流容(rong)量(liang)(liang)約為1800mAh，對于800mAh左右的(de)手機(ji)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)池(chi)(chi)，“可(ke)以充(chong)(chong)(chong)滿1次半(ban)左右”（同上）。輔(fu)(fu)助(zhu)充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)適(shi)配(pei)器的(de)外殼(ke)上標注(zhu)有“Powered by eneloop”的(de)字樣(yang)，由此可(ke)以推測，其內(nei)置充(chong)(chong)(chong)電(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)池(chi)(chi)應(ying)該是三洋電(dian)(dian)(dian)(dian)機(ji)的(de)eneloop品(pin)牌。

　　太陽能(neng)電池(chi)充電器采(cai)用美國SunPower太陽能(neng)電池(chi)單(dan)(dan)元(yuan)(yuan)并聯的(de)結構。模塊為(wei)NTT電子制造(zao)，組(zu)合了使用DC-DC轉換器的(de)升壓電路，以及具備(bei)“MPPT（Maximum Power Point Tracking）”功能(neng)，能(neng)夠按照(zhao)日照(zhao)條件控制輸出功率(lv)達到最(zui)大化的(de)IC。借(jie)助這一結構，“即使部分(fen)單(dan)(dan)元(yuan)(yuan)位于陰影中(zhong)，輸出功率(lv)也不會(hui)大幅下降”（同上）。

圖1：NTT DoCoMo展出的太陽能電池充電器

圖2：太陽能電(dian)(dian)池充電(dian)(dian)器的概要(yao)

圖3：與太陽能電池充(chong)電器組(zu)合(he)使(shi)用(yong)的輔助(zhu)充(chong)電適配(pei)器