Flex Pocket Charger ($60) from PhoneSuit is the most compact Lightning-equipped battery we've yet seen. First previewed at the 2013 CES, the dense aluminum battery pack boasts a 2600mAh, 1-Amp battery, which should be enough to give an iPhone 5 a little more than a full charge. The 2.8" long battery plugs directly into the bottom of your iPhone or iPod, so it'll overhang the width of any current Apple pocket device. When the battery is not in use,…