Pietersen has hit one half century in three one-day innings in the current series
Kevin Pietersen believes England's World Cup campaign has been helped by injuries to some of the team's players.
Bowlers Graeme Swann (back), Stuart Broad (stomach), and Tim Bresnan (calf) have all had time out with problems.
Broad is back with England in Australia while Swann and Bresnan, who should be fit to join the 15-man squad for next month's World Cup, are at home.
"The niggles have allowed a few of the bigger players to go home and recharge batteries," Pietersen told BBC Sport.
"Obviously if it keeps them out [of the World Cup] it's not a good thing but I don't see any harm in the fact that some of the players have had a few days off.
Bresnan confident of World Cup fitness
"They will be recharged and ready. It's a good thing."
Pietersen has so far accumulated 90 runs, including a top score of 78, in three innings in the one-day series against Australia, which the tourists trail 3-1 with three games to play.
The fifth match takes place in Brisbane on Sunday with England needing to follow up their win in Adelaide on Wednesday to keep the series alive.
"We'll be looking to fight as hard as we fought in Adelaide and play a bit better than we did in Adelaide and hopefully get a victory," he added.
"We were 3-0 down so to fight all the way to the end and turn out in Perth (the seventh match in the series) with what could be a final would be incredible."
The 30-year-old Pietersen is looking forward to having a break before the World Cup - which is being held in India, Sri Lanka and Bangladesh - begins on 19 February.
"It's been a tough winter but we've had an amazing time," he continued. "Winning the Ashes has helped a lot.
"We've got nine days until we get home and then there's a quick turnaround but we will be able to recharge our batteries with four days at home."
England will play warm-up games against Pakistan and Canada in Dhaka - which Swann, Broad and Bresnan are expected to be fit for - before beginning their quest to win a first World Cup on 22 February against the Netherlands.
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