David Warner has been dropped for the ongoing one-day series against NZ but Adam Gilchrist believes he can not be "written off".

Warner, who replaced an injured Michael Clarke in the side, could manage just 106 runs at an average of 17.66 in the first three ODIs and was subsequently dropped for the remaining two matches.

Australia are trailing the series 1-2.

Gilchrist said Warner should not lose heart and it was not a big deal to get dropped.

"I wouldn't write him off, he's shown he's got the skill set and the basic foundation to be an exciting player. I'm sure many people (will tell him) that most good or great Australian players get dropped at some stage and most often it's early in their career.

"You go in, get a taste, go out, come back in," Gilchrist said.

The former stumper advised Warner to believe in his talent and make a comeback.

"His challenge is (learning) from the wonderful experience he's had, to trust himself, trust his ability and to keep working hard."