Slim 2 Most Compact 5000mAh External Battery 2.1A Output Portable Charger with Smart Charge for iPhones, iPad, Samsung Galaxy, LG and More-Black

It's significantgly larger, but with 4 times the charge capacity of the usual little cylinders.It'll recharge a kindle AND a smartphone,No complaints

These work wonderfully to charge my 2 work phones. They average nearly 2 full phone charges per battery charge. I like the 4 LED power indicators and the bags they came in, handy to keep stuff out of the ports as they live in the car.

This charges my phone quickly and I can get 2-3 charges out of it when the device itself was fully charged. It is small and pocketable. It’s perfect for charging my phone at work or on a weekend getaway.

I use this bank for night reading with a USB light and with the one I had before I had to unplug to turn it off, this is an issue of the past with the handy button, turn off the energy bank to conserve its energy. If you need a good, travel sized bank you'll like this one.

I just purchased a second one for hubby. Great small charger for iphone. Charges quickly and efficiently. Easy to use in car, purse, golf bag, etc

This charger is a good value. It charged very quickly and held the charge well. It is a tad on the heavier side, but that is likely because it is powerful.

My iPhone is getting old and I am going to need to replace it soon, but in the meantime, I need a portable charger that I can count on to work for me. This one is compact, lightweight, and easy to use. It charges fast. It comes with a small drawstring storage bag. It comes with the cable needed to charge the device. Like all portable chargers you need to supply the cable to connect your device to the charger.

I charged this device up on Thursday. When i needed to use it Sunday, it charged my iphone fast to 100% then turns it self off. I ended up needing to charge my phone again and was able to get a second full charge to 100% before it was out of juice. Its not really slim and barely fits in my hand bag but i love it.