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

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.

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

Slim is great no is fast recharge

I wanted a pocketable powerbank to top up my phone's aging battery that sometimes fails to get through a full day. This powerbank gives my phone a 50% top-up which is about 5 hours of HD video watching. More than enough for my needs.The metal build quality seems excellent. I am a little worried that the built-in USB C cable may be a weak point, but there is a separate USB C socket that can be used if it fails.It's a few millimetres larger than a credit card and easily fits in my wallet.Negatives: It is a little slow to charge from a 5V wall charger (about 3 hours from 0 to 100%). It also doesn't quick charge my phone. Neither of the above is an issue for me, as I will be using it on a bus, train or in a pub at the end of the day.Don't buy this if you want it to quickly fully charge a tablet or a phone. For me, it's the perfect powerbank to get a topup until I get home to recharge. Anything bigger and heavier is overkill.

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.

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.