AWS Batch now supports customer provided AMIs. Previously, Managed Compute Environments launched instances of the ECS Optimized AMI. Now, when creating Managed Compute Environments, you can choose the specific AMI used by specifying the imageId. This makes it possible to change your EBS configuration, automatically mount EFS filesystems for shared storage among jobs, use local instance storage for scratch space, or configure drivers for GPU-accelerated jobs. 
Quelle: aws.amazon.com