The Powerwall for homes and Powerpack for businesses can store energy from solar panels and help you save on energy bills.
Save coupons with your phone's camera, grab coupons others have shared, and get notified when you're in a store that accepts any of them.
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If you're fed up of throwing your hard-earned cash into technology's bottomless money pit, check out CNET UK's guide to penny-pinching gizmos.
The software giant and coffee maker Starbucks each chip in $125,000 to keep Seattle's fireworks display from being canceled.
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