The RAVPower 30000mAh 100W 3-Port Power House is a portable power outlet, with a large battery and even an AC port. So you can charge USB devices on the go as well as mobile devices that only charge via AC.
For the past few months I’ve been shooting a Vello BG-N7 battery grip on a Nikon D810. It retails for only a fraction of the cost of Nikon’s own battery grip. Here’s my hands-on review of the Vello grip.
Many cameras come with an AC battery charger. But charging from a USB power source can be far more convenient when you’re traveling. The good news is that there are USB chargers out there for the batteries used in common camera models, even if you have to hunt a little to find them.
I take photos and travel. I do it for a living. Seven continents. Dozens of countries. Up mountains. Under water. And a bunch of places in between. Based in Washington DC.