Each fully-charged Solar Milk battery can charge a mobile phone three or four times, or a radio once or twice.

每块充满电的太阳能牛奶电池可以给手机充电三到四次，或者给收音机充电一到两次。

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The battery is charged by a solar panel whenever possible.

太阳电池板可随时为电池充电。

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With a thin 'power slice' as the solar powered battery, triple flip owners could carry around extra to keep their phone running days without recharging.

带有“瘦”太阳能电池的智能手机，它的用户可以不用充电而让手机整日开机实用。

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"The one-time cost of our system which consists of a small solar panel, a little motorcycle-sized battery and a couple of LED lamps, is less than one hundred dollars,"

VOA: standard.2009.12.13

Now the battery is easily removable and can be charged in all sorts of ways, like clipping it into a charger powered by a car battery or solar panel.

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The design makes use of solar panels to create a pergola, and the battery would store unused solar electricity for use at night or during a blackout.

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Besides the built-in battery, the solar panel seems the most feasible.

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