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 . Skip to Main Content.

Yes, shorting a 9-volt alkaline battery is not that bad, but doing the same to a lithium battery, for instance, could be dangerous. And it is important that everyone understands not to make ...

Smoke alarms that are not hard-wired into your home’s electrical system get power in one of two ways: a built-in battery designed to last up to 10 years, or a disposable 9-volt battery that you ...

But one of those things could cause a fire - a 9-volt battery. Firefighters showed why it's a danger. With fire extinguishers and a crew standing by, Chief Kevin MacCaffrie demonstrated.