Somerandomguy: you mentioned that you broke some using a 9V battery, does that mean that these are not able to take 9V or 12V? I notice that the Maplin ones state that the 'reverse voltage max' is 5V?
I think i've managed to fry so many of mine doing the same testing with a 12V battery? but what I don't understand is that they seem to work intermittently when testing with a 12V battery?
