I have a Dell Studio Laptop and bought a 12V power adapter to plug into the 12V bike supply. However, it does need 90W power rating (7.5A) so you need to check that the 12V on board socket can take that load, I had some problems with a CAN-Bus supplied socket and it would shut down at anything over 5A load. I don't think I would try and charge the lap top while the engine was not charging, unless you are unhappy with the shape of your battery
Your intelligent charger should take care on Mains Charging, even though you will be on 60Hz frequency, whereas many other regions will be 50Hz. I think the charger will handle that OK.
I have been looking for a system to charge camera batteries and standard AA/AAA rechargeable batteries while on the move on the bike. I don't want to buy an Inverter, though that is an option and USB chargers are not always an option for specialised camera batteries.