I have two batteries for my Cateye headlight and this fits the bill!
I tested it tonight and, with the charging for devices feature, it took my iPhone 7 plus from 55 percent to 100 percent in a few hours.
I'm glad I got this and now I know when I go for a ride I have a battery, recharged, and, if needed, I can use it for the phone.
CatEye Fast Charging Cradle II (CRA-002) USB Cable Included reviews
This charger plus a couple volt 800 batteries were an awesome accessory for my European vacation. I was able to keep this in my pocket with a battery and charge either my cell or my internet hotspot and I could stay connected and productive from across the world.