Got one like my original link in the office. Haven't used it yet but my current lipo charger wouldn't charge single cells.
They get recommeee a lot by the rc crowd so can't be too bad.
Look simple to use.
Most on amazon don't come with PSU I hunted around and found one that did.
Just search b6 charger should pull em up either there or on the bay. IMAX b6 seems most recommended.
There are some that don't need a charger, there's a socket for 240v in, some even supply the 240v lead!
Most seem to be 50w which by my calculations will only give 2700mah at 18v which would be barely enough for a big drill battery. There is also an 80w version which would give a more useful 4400mah.