Batteries. Odds are good you’ve got one in your handbag or rucksack. When your phone is low on juice, they’re extremely handy to have.
But what if you’re travelling far, and you need to keep your larger electronics charged, like your laptop? For that, you need a portable power station, like the Renogy Phoenix 100. This block of lithium and plastic can power all your consumer electronics, as it comes with with AC out, as well as a generic USB-A port.
Renogy mailed TNW a review unit two weeks ago, and so far, it’s impressed.