General > General Technical Chat
Friends and your projects
HowdyPartner:
--- Quote ---Faulty meaning a bad component, or faulty by design?
--- End quote ---
Can not tell, unfortunately. My guess is that the battery has died and it was trying to charge it up all the time.
The point is that 80 mA of standby current is way too much for a car accessory.
Wilksey:
I have seen people state that an acceptable overall drain is between 50 - 100mA, but I can do the battery calcs and I guess if the car is not left for too long that will be OK, not something i'd like to "guarantee" though.
AndyC_772:
These "people" were not informed, reliable sources. Personally I work to the rule of thumb that no automotive device should draw more than 0.5mA continuously on standby, preferably an order of magnitude less.
Remember, this device you've built is supposed to prevent your battery from going flat.
james_s:
My car regularly sits parked for a week or more between uses so it would be a problem if something was drawing 50mA. IMO a car needs to be able to sit for at least 3 months without the battery going flat to not be a pain.
Wilksey:
Perhaps someone should tell the manufacturers, this chap measured a bit higher than 50mA being drawn.
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