I have just purchased a Voltage monitoring LED which changes colour depending on the voltage the battery is being charged at. It shows green above 13.2V, Amber @ 12.45 and red below that. I am fitting it to the Bird to give an early warning of impending Reg/Rec or other charging system failure. I dont know if anyone else has fitted one of these, or if they are interested in my feedback or even wanting to buy one. But if so please let me know and i will give you details. I am not making anything out of it and only paid ?8 for it. It is just i know a few people were looking at these from the USA for a fair bit more money.