My son wants a new charger for xmas but i dont know alot about them other than how to use them. He wants a four port to charge four batteries.what are some good chargers. Also i see in the details of chargers they boast on higher wattages. I though you could only charge a battery so quick What are the advantages to this. What are the advantages of a power supply or what should i look for in a high end charger. I charge 2,3 and 4 cell lipos I also carry my honda gen set for power at races. I also have a venom and reedy charger now.