I recently got a kit of LED DRLs to save power while driving during the day. This will be particularly useful while engine off coasting, however, the fact that they are entirely automatic poses a problem if i coast for longer than 20 seconds, since that seems to be their timeout time.
After some thinking and testing i built this device, it consists of some diodes and a small electric motor wired in parallel, when connected in series with thr DRLs it keeps them thinking that the engine is on!
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2016: 128.75L for 1875.00km => 6.87L/100km (34.3MPG US)
2017: 209.14L for 4244.00km => 4.93L/100km (47.7MPG US)