/diy/ - Do It Yourself

hey
im looking for some help with electricity/batteries

i have a 2 small engines/motors(like pic) powered by 2xAA batteries
i want to buy a adapter so i can use it from AC no buying or charging batteries

do i go for higher V or A for the engine to perform stronger/better?,

i can get
Output: 3.2 V – 1125MA 3,6va
or
Output: 4.5 V – 800 mA 3,6va