Embodiments relate generally to hearing protection devices comprising a battery compartment with a removable cover. Generally, the removable cover has two configurations: an unlocked configuration and a locked configuration. Typically, the removable cover may include a key and be configured to assist in one-handed removable by a gloved user (e.g. while the hearing protection device is being worn). So, for example, upon unlocking, the key might be configured to pop out automatically to allow the user to grasp the key and remove the removable cover.