Between the invention of the self starter and the end of the 20th Century, the best portable car jump starters weren’t something you carried with you. They were heavy lead-acid automotive batteries ...

There’s only one way to answer the question, “Is it my battery, or something else” when your car won’t start: Hook up the best car battery tester and get a readout of what’s going on. Skip the ...

Working out which of your batteries are dead and which still have some juice in them can be a nightmare - but one 'genius' ...

Go to Settings > Battery > Battery Health to check the iPad battery health. If your iPad doesn't have that option, ...