Hello all! Im looking to charge some batterys for my trucks and airplanes. All battery are between 2s and 3s and 1500 to 5000 MAH. I'm looking to buy either one of there two chargers. But one looks bigger and costs a but more. BUT what is the difference?!?! Thank you very much for your help!

Charger #1. http://www.hobbyking.com/hobbyking/s...dProduct=12105

Charger #2. http://www.hobbyking.com/hobbyking/s...idProduct=7028