Will a 1 watt device running of the car lighter drain the battery overnight?
Answers:
No, it will take nearly a Month.. but the battery will probably be flat by than anyway thru lack of use. 1 watt is less than a clock or a flashing LED!!
Yes
Depends on the size of the car battery
Most likely. It depends on the size and condition of the battery
that would depend on the reserve capacity of the car battery and the total amperage drain of your 1 watt device. .05ma drain ona car system is an acceptable amount. anything over .05ma will drain the vehicle battery. I have seen drains on vehicles has high as.15ma drain a car battery overnight.
NO! Not a chance.
An average car battery say 85Ah, can power a 1 watt lamp for about a month!!
wire it up to a 2nd battery in the boot. just tap off the charger connections.
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