there is no reason that new headlights should drain a battery unless they are improperly hooked up. Be careful as you can get 110 watt lights in the 9006/9005 which can cause the wires/switches to get hot unless you use relays. I actually have the front of my car tore apart to put teh same style lights but black, along with HID fogs and lights. I am using relays for everything since the switches in our cars are known to get a little warm anyway, I can take some pics and show what I did if you want?