Which phone has the best battery life and charging? I tested more than 20 phones to find out, here's how the best phones compare.

A popular solar charger for cell phones that Walmart lists as a "best seller" is now marked down to a price that's so low, ...

BYD tests 12-minute charges for 900-mile range; The Nissan Leaf, the first mass-market EV along with Tesla's Model S, gets a revamp.

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