Many (most? all?) laptop supplies these days are universal voltage. You could either use a simple plug adapter, or an AC cord with the appropriate plug.
Check your adapter - if it specifies a voltage range of 100-240V, you're good to go with the plug adapter or power cord. No converter needed.
As for the converter you mention, if it's only for heat-producing appliances, then it's really meant for hair dryers and such. Its output probably won't be suitable for electronics, nor for motor-driven equipment.