I have a bunch of 90 watt chargers but all have round head connectors. The newer charger for the T440 is a hex head. Is there an adaptor or pigtail like the old PS2 keyboard that went from a big round head to USB. I have a lot of new T440 Lenovo laptops and they all come with a hex head instead of round head that plugs into the laptop. Is there an adaptor that fits on the round head and changes to the hex head? This would save me a ton of money to not have to buy all new chargers that come with the hex head. Lenovo really is padding their pockets on this. I have a ton of chargers that have the round head and are 90 watt. If I could find the pig tail attachment to convert the round head to the hex head, I could save a lot of money not having to but the new charger just because it has a hex head.