Serving tech enthusiasts for over 25 years. TechSpot means tech analysis and advice you can trust. Buying a 9-volt battery is now the simplest way to upgrade your home to a smart home. The Roost Smart ...
In a power outage, a 9 volt battery can give your phone enough juice to make a call or send a few texts. You may have seen this hack before, but it works especially well in this variation where you ...
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