Pompey showed flashes of bright attacking play in their midweek draw with Plymouth at Fratton Park.
But there were also chances missed and errors at the back that saw two goals conceded in the 2-2 draw.
Danny Cowley is looking for the same attitude and desire from his troops when they visit Charlton this weekend.
He is hoping for a more complete display at The Valley, however, with Pompey searching for a return to winning ways.
The Blues boss said: “We saw a response on Tuesday night, showing much more energy, intensity, aggression and purpose.
“It certainly felt a lot more like one of my teams and for us it’s now about looking to take that into two difficult away games.
“We’re searching for a consistency in our performances and it will be good to see us back up what we did against Plymouth, while learning from some of the mistakes.
"It certainly felt a lot more like one of my teams and for us it’s now about looking to take that into two difficult away games."
“There’s a real desire in this group to do well and create a team that the fans and the people of Portsmouth can be proud of.”
Charlton have made a slow start to the campaign and currently sit just inside the League One drop zone at this early stage.
Cowley said: “It’s a great game between two big clubs who have lived fairly similar existences in recent times.
“They have perhaps benefitted from being in the Championship more recently, but it’s a game we’re certainly looking forward to.
“Charlton have obviously got Craig MacGillivray, who’s a very good keeper at this level. He’s a lovely boy and a great shot-stopper.
“I know the supporters are very fond of him and I’m sure they’ll give him the reception he deserves before the game.
“They’re going to be travelling to The Valley in their numbers – as they always do – and that’s so important for us.”