Battery Issue
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6th Gear
Joined: Aug 2009
Posts: 11
Likes: 0
From: Simi Valley, CA.
Battery Issue
I ride an 08 Ultra Classic, pure stock, and live in So. Cal, so weather is really not an issue. Charging system works fine.
My battery seems to go dead if I don't ride every few weeks. I replaced my battery with a Deka about 3 months ago.
When just sitting, I measured that it draws 110 millamps, which seems acceptable to me, but I don't know what it should be.
Do I have a battery issue or a drain issue ????
My battery seems to go dead if I don't ride every few weeks. I replaced my battery with a Deka about 3 months ago.
When just sitting, I measured that it draws 110 millamps, which seems acceptable to me, but I don't know what it should be.
Do I have a battery issue or a drain issue ????
Seasoned HDF Member
Joined: Dec 2007
Posts: 8,341
Likes: 714
ive heard the security system takes a small draw,living in wisconsin got me into a battery tender jr. around 20$ i use it year round not just for storage,been getting 5 years or better from batteries.
Road Warrior
Joined: Apr 2007
Posts: 1,656
Likes: 10
From: Northwest Arkansas
It shouldn't go dead in a couple weeks, IMO. I don't have security, but even if I don't put the tender on mine for weeks here in Central Ill. where it can get cold, my battery doesn't go dead.
I got 8 years out of an HD battery with no battery tender.
I got 8 years out of an HD battery with no battery tender.
Seasoned HDF Member
Joined: Apr 2006
Posts: 10,675
Likes: 95
From: Billings,Mt.
I would say with a good battery and your location,3 weeks should not be an issue.
I would find where the currant draw is coming from.
I have left my bikes sitting that long at times without any problems.
Have you checked the battery terminals and grounds for corrosion and loose screws?
I would find where the currant draw is coming from.
I have left my bikes sitting that long at times without any problems.
Have you checked the battery terminals and grounds for corrosion and loose screws?
Last edited by 1flhtk4me; Feb 13, 2011 at 07:37 PM.
Road Warrior
Joined: Aug 2010
Posts: 1,268
Likes: 8
From: Detroit, the asshole of America
At least for cars, 110 mA is not acceptable- that is enough to kill a battery over a week. 50 mA is the bare minimum, and I would expect it to be lower for motorcycles. I think the spec for most jap bikes is in the 5 mA range or lower.
I'm too lazy to go look this information up in the service manual, though.
I'm too lazy to go look this information up in the service manual, though.
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Road Warrior
Joined: Oct 2008
Posts: 1,692
Likes: 22
From: Denham Springs, La
I'm guessing that you have a battery drain issue. At a rate of 110 milliamps, about .1 amps, the battery will discharge 1 amp in 10 hrs.(.1 Ah). Therefore, in 300 hrs. the battery will have discharged 30 Ah, or be discharged. 300 hrs=12.5 days. This is a rough calculation and because the discharge rate is so small, the battery will last longer than 12.5days but probably not much.
This is based on some quick research and I don't guarantee exact results.
Cecil
This is based on some quick research and I don't guarantee exact results.
Cecil