Auskang Slim Power Bank with Built-in Cable 2500mAh, [USB C version] The Most Lightweight Battery Bank and Thinnest Portable Phone Charger - Credit Card Size

This mini credit card sized powerbank seems really good. Small and very light it could easily fit into a pocket or handbag. I love the fact that the cable is inbuilt so there's no need to carry a separate one to charge your phone. It holds quite a lot of juice certainly enough to give my phone a good boost when out and about. It's a gorgeous pale blue colour too. I would recommend this product

This tiny power bank fits in my wallet. It provides back up power for my phone anywhere. Brilliant l little device.

I really like this as a handy pocket-sized charger. the built-in cable makes it even more practical and the charge indicator lights are helpful.

Wanted a very small battery pack to fit in a Maxpedition Micro pouch, which this does. It'll take a charge in an hour or two, and charge an iPhone one and a bit times, extending timeouts to days if travelling in remote areas (or like me you're simply forgetful of overnight plugins.) Team with an Incharge X adapter and a few male/female USBA/Cs, and you've got a charging solution for almost any small device. I recommend both this and its 5000mAh bigger brother which fits in the same small pouch although is a bit snugger.

I wanted something small enough to carry everywhere, and this fits in my pocket. It's a little bit too big to fit in my wallet, but I knew that when I bought it, it's good for one charge.

I love this skin battery pack as it's so easy to have in your pocket.But for some reason in it's 11th month it exploded , or rather expanded and split the case. 🤷🏻

Waste of money. It did show the charging symbol for a few minutes then vanished. I used more energy myself attempting to try it 3 times before giving up. Useless.

I love this. Nice and compact and easy to carry around for emergency power. Would definitely recommend.