Dane van Niekerk scored her second fifty in a row to help South Africa’s women level the series against England with a 17-run win via the Duckworth/Lewis-method.
The game was interrupted by rain a few times but South Africa’s healthy scoring rate enabled them to stay ahead of the D/L-method as they finished on 145-3 chasing 157.
Van Niekerk smashed 63 from 43 including seven fours and two sixes, which laid the foundation for the successful chase. She scored 52 in the first T20I.
Captain Mignon du Preez (47 not out) and Marizanne Kapp (21 from 13) also did some damage and ensured the home side never fell behind the asking rate.
Earlier England scored 156-6 thanks to a second consecutive fifty by Sarah Taylor, who was run out for 66 from 52 deliveries and hitting eight fours in the process. She scored an unbeaten 74 in the first game.
The series is now level at 1-1 with the final game to be played as another double-header with the men at the Wanderers on Sunday.
Van Niekerk was named Player of the Match.