General rules for EMP:

The longer the wire or antenna is, the more susceptible a device is to damage from an EMP. Battery powered devices without antennas should be more resistant to EMP damage than those with antennas, and much more than those plugged into a power outlet.

Simple semiconductors tend to be more resilient than complex semiconductors. An LED flashlight should in general be more resistant to EMP damage than a laptop CPU, for example. A flashlight that uses direct drive (which I think all the Maglite LED models do) is likely to be more resistant to EMP damage than one with a more complex driver.

A Faraday cage is pretty easy to construct, and if constructed correctly provides very robust protection against EMP damage.