Replace the battery every two years — critical level log records will begin to appear before that.

每两年更换一次电池——否则会出现临界级别的日志记录。

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This approach allows you to pop in a fresh spare when your battery runs out of juice between charges, and to easily replace a battery when its lifespan is over.

这样当你电池耗尽又未能及时充电的时候就可以换上一块新电池，电池寿命耗尽的时候也可以轻松更换。

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There is, though, another way to recharge a flow battery: pump out the discharged electrolyte and replace it with a solution that has been recharged elsewhere.

另外，还有一种方法可以使流体电池重新充电：将释放电量的电解质溶液抽空，然后重新充入溶液。

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And if Sadoway is right, the two ways to make sure it does not happen again are to change the design of the lithium-ion battery or replace it with a safer, but less-powerful battery technology.

FORBES: 'Thermal Runaway' in 787 Dreamliner Batteries Must Be Stopped

The FAA gave Boeing the go-ahead to replace battery systems with a new design last week.

BBC: US lifts Boeing Dreamliner ban

Boeing is working to replace battery systems that are believed to have been behind fires on two 787s run by Japanese airlines in January.

BBC: US lifts Boeing Dreamliner ban