Icebound wrote:

Maybe you night flyers may be interested in something like this to throw
into the emergency kit:

5 inches overall, doesn't give the weight. Handcrank 2 minutes charges it
for 30 minutes of light. 3 bulbs: can use 1 to save power or all 3 to get
more light.

20 bucks US.

Do an experiment first to see how much it'll affect your compass.
I had one of those 'shake to charge' units and it has an
enormously-large magnetic field.
The hand-crank unit I now have will only affect the compass if
I place it very close by.