Another thought that might make it even simpler (for the user) is to have the device download the data at a throttled rate so it could be done during the workda

Another thought that might make it even simpler (for the user) is to have the device download the data at a throttled rate so it could be done during the workday without impacting the network too much. This way it would be unnecessary to leave it overnight or perhaps even take it out of the purse, backpack, or briefcase. It would still be necessary for the user to remember to recharge it and maybe switch it out or rotate it with other devices.