I've been using this power bank for the past couple of months (https://www.amazon.com/gp/product/B076J7PKBM) and it's great! It's lightweight and fits anywhere in my purse, I am able to charge my Galaxy S8+ more than once if needed and I love that I can use USB C cables to charge faster. I've also saved a few friends from running out of juice thanks it having two ports. They both charge pretty fast even when used at the same time. It's got a flashlight in case you needed, I personally haven't used it but it works great. It has LED indicators that show how much battery is left on the power bank which is very helpful. Overall a great battery pack for any device!