It would be a really cool feature for ZPM Carts, Consoles, and Hubs to work as peripherals, so you could monitor the power level of the ZPMs with a computer.

For ZPM carts and consoles, only one function would be needed, that returns the power level of the ZPM as a number if present, or false if it is missing. For ZPM hubs, it could act the same as the previous example, but return 3 values, one for each ZPM slot.

I feel that this feature would greatly improve ZPMs, allowing for remote monitoring, time estimation, replacement warnings, and more.