Home page
SPONSOR AD

Support our Vendors!  |  Advertise Here

Topic: clock draining battery?

in Forum: C3 Electrical


Already a Member?
Login
Not yet a Member?
Register for Free!

clock draining battery? (1/10)
 4/23/24 3:48pm
WayneG67
Standard Member
Send Private Message

Murrieta, CA - USA

Vette(s):
1973 Blue Coupe 2017 Z51


Joined: 8/17/2021
Posts: 15

Will a .03 amp draw cause my battery to go dead in maybe a week of sitting?

Our Sponsors help support C3VR
Re: clock draining battery? (2/10)
 4/23/24 9:24pm
Adams' AppleLifetime Member
Lifetime Member
Moderator
Send Private Message

Duncanville, TX - USA

Vette(s):
#1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas


Joined: 11/8/2003
Posts: 20131

It shouldn't. I used to let my '74 sit for months without starting, with a reproduction battery, it wouldn't drain the battery. I now have a dis-connect, and use a battery maintainer on it. More of a safety issue for me than anything. Have you had your battery tested? 



______________

Joel Adams
C3VR Lifetime Member #56    

My Link


(click for Texas-sized view!)
             NCRS

"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

Re: clock draining battery? (3/10)
 4/26/24 11:36am
blu72
Standard Member
Send Private Message

Pasadena, MD - USA

Vette(s):
72 Coupe L48 4 sp Air Tilt Leather


Joined: 6/16/2004
Posts: 292

I had to disconnect the battery in my 72 because the clock did kill the battery in less than a month. It is one of those new quartz updated clock. I don’t know the drain, I could measure and also that intrigued me for years. Safety disconnect with one of those screw thingys on the battery connector. 



______________

Bruce
72 Coupe L48 4sp
Custom Blue/Silver/Pearl

(Click for a larger pic)

Re: clock draining battery? (4/10)
 4/26/24 4:15pm
WayneG67
Standard Member
Send Private Message

Murrieta, CA - USA

Vette(s):
1973 Blue Coupe 2017 Z51


Joined: 8/17/2021
Posts: 15

Thanks for the reply!My clock doesn't even work.I was just wondering if it still might have a draw.I don't think .03 amps is too bad.Guess i'll live with it!Thanks

Re: clock draining battery? (5/10)
 4/26/24 7:49pm
F4GaryGold Member
Gold Member
Send Private Message

Grapevine, TX - USA

Vette(s):
1972 LT-1 convertible with factory air.


Joined: 8/26/2006
Posts: 1411

I had a parasitic drain that turned out to be the light in the center storage compartment.  It wasn't going out with the lid shut.

Didn't notice it until I was looking for something in my dark garage. Killed my Optima battery.



______________

   

Re: clock draining battery? (6/10)
 4/26/24 7:53pm
manchestersharkLifetime Member
Lifetime Member
Send Private Message

Equinunk, PA - USA

Vette(s):
1972 conv, 4-speed, 350, 200hp, numbers match, rally wheels, war bonnett yellow w/white top. good condition, nice driver.


Joined: 10/31/2007
Posts: 2391

Hi, Don't mean to degrade your abilities, But can you disconnect the wire on the clock? 



______________


Click on image for full view

Re: clock draining battery? (7/10)
 4/27/24 10:01am
blu72
Standard Member
Send Private Message

Pasadena, MD - USA

Vette(s):
72 Coupe L48 4 sp Air Tilt Leather


Joined: 6/16/2004
Posts: 292

The clock question got me interested in figuring out the battery life.

Please correct me if my calculations are not correct.

I measured my battery drain with just the replacement quartz clock running. It draws .019ma or .019A.

Assuming a car battery has 40 - 60 Amp hours capacity when new, I'll go with 50.

.019 x 24 hours = about 0.5 AH a day.  50/ .5 = 100 days till dead.

Not wanting to go below 80%, or the car won't start, that means 20 days.

Of course a bigger battery or one with little life left will affect this. 

That's about what I found out in real life, so I disconnect the battery when not in use. 

A battery maintainer would solve this this for sure. 

 The original GM clock with the autowind mechanical movement - I have no idea what that  intermitant draw would be. 

 

  



______________

Bruce
72 Coupe L48 4sp
Custom Blue/Silver/Pearl

(Click for a larger pic)

Re: clock draining battery? (8/10)
 4/27/24 3:41pm
blu72
Standard Member
Send Private Message

Pasadena, MD - USA

Vette(s):
72 Coupe L48 4 sp Air Tilt Leather


Joined: 6/16/2004
Posts: 292

I also had a drain on the battery in one of my other cars, a 1994 SS Impala. The glove box light was not going out - same as our friend F4Gary. Spotted that by accident at night. It also killed my Optima expensive battery. 🤨



______________

Bruce
72 Coupe L48 4sp
Custom Blue/Silver/Pearl

(Click for a larger pic)

Re: clock draining battery? (9/10)
 4/30/24 2:11pm
WayneG67
Standard Member
Send Private Message

Murrieta, CA - USA

Vette(s):
1973 Blue Coupe 2017 Z51


Joined: 8/17/2021
Posts: 15

Wasn't sure if it can be reached,Just thought i'd see what the actual drain was for the clock.Thanks for the reply.I think the problem was the center compartment lid wasn't closing all the way.Only had the car a week.

Re: clock draining battery? (10/10)
 4/30/24 2:14pm
WayneG67
Standard Member
Send Private Message

Murrieta, CA - USA

Vette(s):
1973 Blue Coupe 2017 Z51


Joined: 8/17/2021
Posts: 15

Sounds about right!The clock not working kinda threw me off(easily done)ha!

Our Sponsors help support C3VR