Not ultra slim but I’d still give it 5 stars because it charges the phone quickly and has enough charge remaining that I don’t have to recharge the battery after every time it charges the phone. It’s got a string magnet too so it doesn’t slide off the phone in my pocket.

I was not wanting to spend this much for a power bank, but I got tired of buying cheaper ones that let me down. I used this a lot while out and about over spring break and I’m amazed at how well it works. So far so good!

It adds no noticeable weight when attached to my phone. And it snaps so strongly to the back of my phone that I have zero concerns about it separating. Plus unlike power banks that I have to hold in addition to my phone, this attaches to my phone, hugging it so closely that for all intents and purposes it is as good as one unit., fitting perfectly in my hand. What I love most is that I can be mid call and realize I’m almost out of power - but no panic! In a quick snap my conversation carries on with the powerbank and phone working in sync. Love this!!!

Have two of these now. I had to get it in the teal oasis color because I love to match and Apple just came out with their spring silicone colors. These packs work amazingly well! Light and compact and function well! I recommend Anker to everyone! Their products are great!

I have used it multiple times since purchase and it charges very quickly. It’s sleek and easy to transport.