Malians vote in presidential run-off

Malians are voting in a watershed presidential election run-off expected to usher in a new dawn of peace and stability in the conflict-scarred nation.

Almost seven million voters have a choice between former premier Ibrahim Boubacar Keita and ex-finance minister Soumaila Cisse to lead Mali's recovery following a military coup that ignited an Islamist insurgency and a French-led military intervention.

Both candidates declared themselves confident of victory in the run-off, called after none of the 27 candidates in the first round on July 28 achieved an outright majority.

The election, the first since 2007, is crucial for unlocking more than $US4 billion ($A4.42 billion) in aid promised after international donors halted contributions in the wake of last year's coup.

The run-up to the vote was largely uneventful, with cities and towns deserted as Malians - over 90 per cent of whom are Muslim - stayed at home to celebrate the Eid al-Fitr festival marking the end of the holy month of Ramadan.

The rivals have faced off before, losing the 2002 presidential election to Amadou Toumani Toure, who was overthrown by a military junta in March last year as he was preparing to end his final term in office.

The return to democratic rule will allow France to withdraw most of the 4,500 troops it sent to Mali in January to oust al-Qaeda-linked extremists who had occupied the north in the chaos that followed the coup, imposing a brutal regime of sharia law characterised by executions and amputations.

Keita, who is considered the favourite, was more than 20 percentage points ahead of his rival in the first round but Cisse has remained optimistic.

Cisse had complained about widespread fraud in the first round while more than 400,000 ballots from a turnout of around 3.5 million were declared spoiled.

Mali's Constitutional Court rejected the allegations, however, confirming that Keita, 68, had won 39.8 per cent, while Cisse attracted a 19.7 per cent share.