Battery maintenance work is relatively simple, do a good job of electrolyte supplement, battery and pole cleaning and battery weight control, etc.

蓄电池维护工作比较简单，做好电解液的补充、蓄电池和极桩的清洁和蓄电池的比重控制等工作，就能有效的延长蓄电池的使用寿命。

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It has built-in rechargeable battery and looks cool, light weight, small and compact - it weighs only 90g.

它带有内置式可充电电池，看上去很酷，重量又轻，小巧紧凑——只有90克重。

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Apple says the two models are the same size and weight as their predecessors, yet their battery capacity has grown by 33% and 46%, respectively.

苹果公司说，这两款新电脑与此前的型号有着相同的尺寸和重量，但新电脑的电池容量分别增长了33%和46%。

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Alta's technology can reduce that battery weight by 70 percent, saving approximately 25 pounds of pack weight.

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When LeMieux was hiking the Appalachian Trail a decade ago, he identified the problem that would become the focus of his work: how to turn the kinetic energy of a hiker into electrical energy that could keep devices charged (and reduce the battery weight he carried for 1, 500 miles).

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All this with no compromises to battery or weight - Kindle Fire HD combines the most power-efficient LTE chipset available with a custom-designed 4G wireless modem that's only 2.2 mm thin.

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