It only holds one charge. But it charges super fast both ways.
As a family of 6 we live for our weekends away at our rustic cabin in the mountains. No water, no electricity, no wi-fi... All my barebones lights have transformed my space into a cozy, if not instagram-worthy retreat and i'm obsessed with everything i have purchased from Barebones. As far as the chargers go - I just purchased my second one. It's so nice to light up the cabin without propane lanterns and battery powered plastic lights. After our last trip up, I realized that the barebones battery pack lasted longer on the edison lights than another brand of charger, and I was able to power an entire string of edison pendants for the weekend with the Barebones charger... they work very well.
Love it. Didn't realized it had a flashlight as well! I take it for backup for my phone when I'm camping!
I bought one of these to power the Edison string lights, works great. One day when my phone battery went to 0% the Portable Charger worked so much better than my usual one that I put the old one to pasture and bought a second one to be sure I always have a fully charged one at hand.
I have enjoyed this charger, using it to fun a string of hanging lights from Barebones, but do not let it get even a little bit damp! It will not hold a charge if it gets damp, which makes it unreliable for outside path lighting.