An active temperature controlled container is configured to be portable so as to safely transport temperature sensitive and perishable goods (such as biological material): within a vessel that is thermally coupled to a thermoelectric assembly disposed within the container, where the thermoelectric assembly is powered by a battery. The battery is secured within a compartment in an outer portion of the housing of the container in a way that the battery may be removed to be recharged, inspected, swapped out for another battery or power source, or the like.