The Addicks avoided slipping to a morale-sapping eighth defeat in nine games when they battled to a 1-1 draw against promotion-chasing Saints.
"Anyone who was there on Tuesday would have seen a really committed display," said Powell.
"It has been a really barren period. Admittedly it was only a point but it was the manner of how we got that point and how we tried to go forward.
"We were playing against a team who have been very good this season and I felt there was a lot of courage out there.
"I know what quality we have and it's about displaying it and being brave enough."
Source: PA
Source: PA