[Alfisti]

I am googling this and getting so much conflicting advice i thought i'd hit up the knowledgeable folk here.

What tool/device should I be looking at that can charge my car's battery if it dies? I am talking I wake up, car has a mystery power draw we cannot trace, car is dead to the world and i need to properly recharge the battery. So not just a boost but a proper charge.

Thanks in advance egg heads.