Maintenance-free battery is also need maintenance.

免维护电池不等于不需要维护。

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Maintenance-free battery cell facilitates the maintenance.

免维护电瓶，维护简便。

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The sun battery in UPS power supply system, Germany Germany sunshine and maintenance-free battery USES mostly.

在UPS供电系统中，德国阳光蓄电池大多采用免维护德国阳光蓄电池。

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But heck, I got a free battery, so that makes everything OK!

FORBES: Apple Stores Lose Appeal, Need Shot Of Starbucks

This week, Heathrow Airport introduced a new form of transport that will look familiar to fans of mid-century science fiction: emission-free, battery operated personal transit pods.

BBC: The futurist: Heathrow��s personal transit pods

If you're unlucky (or lucky, depending upon your viewpoint) enough to be affected, then Nokia will provide a replacement battery free of charge.

ENGADGET: Nokia-branded batteries at risk of overheating -- 46 million devices affected