if your iron has trouble heating up maybe its your tip they should be replaced every year if the places you do your soldering has electricity chance are they also have an electrical outlet don't over complicate you life get the simplest and easiest to use iron
I have an old Ungar. Most people don't even know what that is. I can solder anything from a microchip to a heat sink with my tips. Yes it plugs in, but I'm old fashioned. I don't care what anyone says.
"The nine most terrifying words in the English language are: I'm from the Government, and I'm here to help." - Ronald Reagan