I can understand the seriously scathing reviews on here about Venom products. I bought a similar charge kit to the one I am reviewing, also made by Venom. It didn't come with the charge pod, simply two battery packs and a USB cable. I think it's still on sale on this site, I bought it last year from here. I would avoid that particular product at all costs. The battery packs seemed fine, but the USB was flimsy, cheap, and the connection snapped off as I was going to charge a battery.
I would, however, thoroughly recommend this product. For value for money's sake, it is fantastic. I have had this product a year or so, and the saving I must have made on conventional AA batteries must be through the roof. It comes with the charge pod, wired not by plug, but by USB (there is a USB port in the back of your xbox) and two battery packs. As long as you have one battery pack charging at all times, swapping them over and never having to wait around for them to charge up should never be a problem.
System is simple. There are two lights on the charge station. Red and green. Red beams constantly when charge is empty or low, red flashes when halfway, and green beams when battery is full and ready.
I could not recommend this product enough, you will save a fortune.