Mandhana goes after spinner Silver Siegers with four boundaries in a row in the 15th over.
The left-hander smashes the full delivery inside out over the covers before hammering the next back over the bowler's head for successive boundaries.
The spinner drops it short as Mandhana pulls it through square leg for the third four of the over. She then eaves the last ball over midwicket to make it four boundaries in the over as India race past 150 in the 15th over.
