KINDEN Fast Battery Charger - 0.2A-1.5A Manual Setting LCD Portable Travel Smart Charger for Li-ion(4.2v),IMR,INR,ICR,Ni-MH/Ni-Cd (1.48v)

Works great! I've dual-charged 20700 batteries to full about 3 times so far and no problems. It's built surprisingly well, and I don't think there's any risk of it melting or having other problems that you'd worry about with a cheap charger. The price is really good!