NTT DoCoMo開發出了能夠利用太陽能電池發電的手機充電器，并且在“CEATEC JAPAN 2009（圖1，圖2）。該(gai)充(chong)電(dian)(dian)器的最(zui)大(da)輸出電(dian)(dian)流(liu)約為300mA，在日照良好的場所只需3～5小時即可充(chong)滿手(shou)機的鋰(li)離(li)子充(chong)電(dian)(dian)電(dian)(dian)池。外形尺寸為114mm×146mm×15mm。

　　除太(tai)陽能(neng)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)外，NTT DoCoMo還開發(fa)出了暫(zan)時儲存太(tai)陽能(neng)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)生成電(dian)(dian)(dian)(dian)(dian)(dian)量的(de)(de)“輔(fu)助充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)適配(pei)器(qi)(qi)”（圖3）。通過與太(tai)陽能(neng)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)器(qi)(qi)組合使(shi)用(yong)，白天太(tai)陽能(neng)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)產生的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)量可以(yi)存儲在(zai)輔(fu)助充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)適配(pei)器(qi)(qi)中，在(zai)夜間通過輔(fu)助充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)適配(pei)器(qi)(qi)為(wei)手機(ji)(ji)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)。“完全無(wu)需(xu)插頭即可使(shi)用(yong)手機(ji)(ji)”（NTT DoCoMo解說(shuo)員）。輔(fu)助充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)適配(pei)器(qi)(qi)的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)流容量約為(wei)1800mAh，對(dui)于(yu)800mAh左(zuo)右的(de)(de)手機(ji)(ji)充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)，“可以(yi)充(chong)滿1次半左(zuo)右”（同上）。輔(fu)助充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)適配(pei)器(qi)(qi)的(de)(de)外殼上標注有(you)“Powered by eneloop”的(de)(de)字樣(yang)，由此(ci)可以(yi)推測，其(qi)內置充(chong)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)池(chi)(chi)(chi)應該(gai)是三洋電(dian)(dian)(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)eneloop品牌。

　　太(tai)陽能電(dian)池(chi)充電(dian)器采(cai)用(yong)美國SunPower太(tai)陽能電(dian)池(chi)單元并(bing)聯的結構。模塊為NTT電(dian)子制造，組合了使用(yong)DC-DC轉換器的升(sheng)壓電(dian)路，以及具備“MPPT（Maximum Power Point Tracking）”功能，能夠(gou)按照日照條件控制輸出功率(lv)達到最大化(hua)的IC。借助這一結構，“即使部分單元位于(yu)陰影中，輸出功率(lv)也不(bu)會大幅下降”（同上）。

圖1：NTT DoCoMo展出的太陽能電池充電器

圖2：太陽能(neng)電(dian)池(chi)充電(dian)器的概要(yao)

圖(tu)3：與太陽能電池充電器組合使用的輔助充電適配器