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Komando picks

The problem with lithium-ion batteries

Everything from your smartphone to cordless vacuum cleaner uses a lithium-ion battery, and demand is growing as more electric vehicles hit the market. The issue is that there is only so much lithium on the earth, and we may be running out. So what does this mean for the future?

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Stop robocalls once and for all

Robocalls are not only annoying, but they scam Americans out of millions every year. Learn Kim's tricks for stopping them for good in this handy guide.

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