To keep the battery charged, it requires exposure to 10 hours of indoor light each day or 1.5 hours of sunlight.

为给电池充电，须达到每天10小时的室内光照或1.5小时的日照时间。

youdao

A solar battery traps sunlight and converts it into electrical energy.

太阳能电池捕捉阳光，并将阳光转换成电能。

youdao

Electricity from sunlight is truly "green" and inexpensive but requires an energy conversion system with photovoltaic (PV) cells and a storage unit, such as a battery.

来自于日光的电能是真正“绿色”和廉价的能源，但是需要基于光伏(PV)电池和存储设备(例如电池)的能量转换系统。

youdao

Qualcomm says the setup enables bright colors in direct sunlight, weeks-long battery life and an image refresh rate fast enough to support video.

FORBES: Qualcomm Gets A Fourth Mirasol Device: Taiwan's Koobe Jin Yong E-Reader

Wysips says its 0.5 millimeter-thick screen can be plugged directly to the phone's power inlet to provide an extra four minutes of battery life for every 10 minutes it is exposed to direct sunlight.

CNN: STORY HIGHLIGHTS

Take a look at the geniuses behind Aquion Energy, a startup that invented a special kind of nontoxic battery that acts as a energy storage solution for products that rely on sunlight to produce energy.

FORBES: Green Living In America's "Steel City"