This phone charges using micro USB, and the most simple (and most commonly available) solution is to purchase a micro USB cable and a USB wall adapter as two separate units (but they are often bundled together).

I feel like we should clarify that it's really difficult to go wrong with a micro USB adapter, as it is literally just four wires wrapped up in rubber (with ports on either end of course). Sometimes they are gold plated and sold at very high prices, and sometimes they are made of cheap materials and sold for pennies. This has literally no affect on functionality and is all marketing (if it conducts metal, it works!)

As far as wall adapters, I would personally try to find an OEM one by LG, Samsung, Motorola, etc. They tend to be compact, work very well, and are cheap.

Here's one from Samsung that includes a wall adapter and cable: http://www.amazon.com/Samsung-Travel-Charger-Detachable-Charge/dp/B006YCORR0/ref=sr_1_1?ie=UTF8&qid=1356568835&sr=8-1&keywords=oem+charger