But Parkinson sees the loan move as "a chance for us to look at him and for him to look at us" ahead of a potential move for the 28-year-old, whose contract runs out at the end of the season.
"We felt we needed some more pace and power (up front)," Parkinson said. "We'd been chasing him for a month and finally Brian Laws agreed to let him come down to us.
"His contract is up in the summer and it's a deal we could possibly make permanent in January if we like him and he likes us.
"If Akpo's heart is as big as his brother's (Addicks centre-half Sam) he'll give us a great chance. Strikers are so important and having Akpo and Leon McKenzie to bring off the bench can frighten the life out of defenders."