Acer Liquid Gallant Duo official Pictures. Acer Liquid Gallant Duo is a Smartphone of acer. The Acer Liquid Gallant Duo Android Smartphone. Announced Jul 2012. Features 4.3″ Display, MT6575 Chipset, 5 MP Primary Camera, 1500 MAh Battery, 4 GB Storage, 1000 MB RAM. Acer Liquid Gallant Duo price starts.