Cheap is nice !!! i just did the same; my nephew is 2 years old and he forgot his toy cellphone in my place; that thing (used to) had lots of leds !!
Can you see the Bixler ??
and now ??
the 2 pieces carry their own tiny battery and have a on/off switch, what else do we need !! SWEEEET !!!
attached with velcro so i can take it off during day flying ...