Belkin Road Rockstar: 4-Port 36W/7.2A Passenger Car Charger
I didn't realise Belkin made a 4-port car charger besides my Aukey one. The Belkin Road Rockstar, available at all 34 Challenger outlets and Lazada for S$79, is a 36W/7.2A charger with two USB ports on the unit itself.