Well the idea is:
You pressed one time turbo. Then lets say you double tap turbo and your turbo goes level 2. It will drain more energy but it gives ya more power. After you reached turbo level 2 if you tap 3 times turbo you get turbo level 3. If you tap one time turbo disappears.
We can notice somethin like this in dbz 109 when vegeta is dreaming
You pressed one time turbo. Then lets say you double tap turbo and your turbo goes level 2. It will drain more energy but it gives ya more power. After you reached turbo level 2 if you tap 3 times turbo you get turbo level 3. If you tap one time turbo disappears.
We can notice somethin like this in dbz 109 when vegeta is dreaming