Re: [DMCForum] Relays & current draw
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Re: [DMCForum] Relays & current draw


What about putting in a battery cut-off switch??  I
put one on TPS and the switch has it's own key.  With
no power applied to anything, my battery stays charged
for months on end and it makes the car almost theft
proof.  The only downside is you have to reset the


--- Ryan Wright <ryanpwright@xxxxxxxxx> wrote:

> Short question: How long until the average relay,
> energized, drains my
> battery? Looks like most Bosch 12v relays draw
> ~160ma. How long would
> that draw take to drain a battery down too low to
> start, on average?
> Days? Weeks? Months?
> Long version: I have several features on my car
> (door launchers, trunk
> popper) that I want to tie in to my parking brake's
> ground, such that
> they will only operate when the brake is set.
> However, the ground wire
> & switch on the brake are rather small, and the
> actuators draw enough
> current that I thought it a good idea to use a relay
> to give me a
> better ground path. Problem is I don't want to
> create a current draw
> that will be hard on the battery. Quite frankly I'd
> like to be able to
> leave the car for months without draining the
> battery. Even though
> I'll never do that, I just don't think it's a good
> idea to build a
> system that will draw the battery down within a 3-6
> month time frame.
> Is there a better way to do this, other than a basic
> relay? Something
> that will draw much less (or no?) power when set?
> Thank you!
> -Ryan

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