Usually I'm not a fan of pocket portable chargers. Most of the ones I've come across just aren't great quality and fall apart after some use. They're usually made from very cheap plastic which means they break quite easily.
However I was pleasantly surprised by the PhoneSuit Flex pocket chargers. I wasn't expecting much at first, but when I got hold of them I was very pleased by the quality and feel of them. The first thing you'll notice when picking one up is the feel and weight of it. It feels really dense, and it should because it packs a whopping 2600mAh battery. The outside of it has a very lovely aluminium finish - it's of very high quality, the same sort Apple use. The aluminium really does it give it a premium feel.
I got hold of both the Lightning and Micro USB versions. Both pack the same 2600mAh capacity and have the exact same design, only difference is the connectors of course.
The iPhone 5 has a 1440mAh battery, so the Lightning version can easily completely recharge an iPhone 5 from dead and still have enough to charge it again up to around 50%. You get around one and a half charges out of it. It also uses the same power output a power socket would give out, that means it'll charge it just like your charger at home would at around 1% per minute. I've found many chargers don't support this, PhoneSuit have got it right here thankfully.
The MicroUSB version has the same 2600mAh capacity. But with many very recent Android phones, you'll only get around one charge out of it. The HTC One has a 2300mAh battery and the Samsung Galaxy S4 has a 2600mAh battery. But then those Android phones do have very large power consuming screens and more powerful CPUs so it's to be expected. It isn't limited to Android phones of course, it'll work with anything that has a MicroUSB port.
The pocket chargers charge via MicroUSB. Provided in the packaging is an extra MicroUSB cable. You can charge the pocket charger while it's connected to your device, allowing you to charge simultaneously. The image above also show an electrostatic touch surface, when touched with your finger it'll show how much charge is left in the pocket charger in the form of four tiny LEDs.
These pocket chargers are the best chargers I've come across. They make me want to get them out and use them. The quality and capacity is brilliant and in such a small package. The aluminium finish is simply fantastic and gives it an ultra premium feel. They aren't cheap though with the Lightning version costing $69.95 and the MicroUSB version costing $59.95, but then you really do get what you pay for, nothing good came cheap.