Insulin pump data acquisition device

A data acquisition device for use with an apparatus having a battery compartment, the data acquisition device comprising:

• a battery casing sized to fit within the battery compartment, the battery casing having an internal volume;
• an environmental sensor operable to generate environmental data in response to environmental conditions;
• memory operably connected to the environmental sensor, the memory being operable to store the environmental data;
• a controller operably connected to the environmental sensor and the memory, the controller being operable to control reading of the environmental data from the environmental sensor and writing of the environmental data to the memory;
• and
• a battery operably connected to power the environmental sensor, the memory, and the controller;
• wherein the environmental sensor, the memory, the controller, and the battery are disposed within the interior volume.