Yes, you can technically buy external batteries that have their own plugs built-in. However, Nomad's bring-your-own strategy is not just efficient, but cheap -- the Plus will cost $39 ($20 if you use the code "nomadplus" within the next few days), or considerably less than a dedicated external battery like Mophie's $50, 1,350mAh Power Reserve. You'll have to wait until the end of November before you can pick one up, but it might be worth waiting if you don't need the additional electricity right away.
If you're tired of lugging around both an external battery pack and a power adapter to keep your iPhone running, today's your lucky day. Nomad (the company behind the ChargeCard) has started taking pre-orders for the NomadPlus, a 1,500mAh external battery that takes advantage of the Apple's official power plug to save space. Slide the charger in and you can top up your iPhone (or other low-power USB devices) with one peripheral, whether or not you're anywhere near a wall outlet. Logically, it will also recharge its own battery when plugged in. The gadget doesn't provide much energy on its own -- it will only bring an iPhone up to 70 percent -- but it should be enough to get you through a typical day.
All products recommended by Engadget are selected by our editorial team, independent of our parent company. Some of our stories include affiliate links. If you buy something through one of these links, we may earn an affiliate commission.