A protester holds an image of deposed Myanmar leader Augn San Suu Kyi during a rally against the military takeover in Myanmar, in Osaka, western Japan, Sunday, Feb. 7, 2021. AP
Suu Kyi has been a prisoner since the military toppled her government in February 2021, ending the Southeast Asian nation's brief period of democracy.
She has been convicted on 14 charges, ranging from corruption to illegally possessing walkie-talkies and flouting Covid restrictions.
The Nobel laureate and democracy figurehead has been sentenced to a total of 26 years in jail on those charges.
The remaining five corruption charges she faces relate to the rental of a helicopter for a government minister, a case in which Suu Kyi had allegedly not followed regulations and caused "a loss to the state".
She testified on Tuesday that she was "just giving instructions according to the office procedures", a source with knowledge of the matter told AFP.
"There was no corruption in this," Suu Kyi said according to the source, who added she appeared in good health.
Each corruption charge carries a maximum jail term of 15 years.
Journalists have been barred from attending the court hearings and Suu Kyi's lawyers have been banned from speaking to the media.
In June, she was transferred from house arrest in military-built Naypyidaw to a prison compound, where her trial continues at a special court.
Authorities last week released former British envoy Vicky Bowman, Australian economic adviser Sean Turnell, and Japanese journalist Toru Kubota in a mass amnesty, a rare olive branch from the isolated junta.
Turnell, an economic adviser to Suu Kyi's government, had been arrested shortly after the coup and jailed along with Suu Kyi for breaching the official secrets act.
The military alleged widespread voter fraud during the November 2020 election, won resoundingly by Suu Kyi's National League for Democracy party, although international observers said the poll was largely free and fair.