battery drain.. not sure what it is - BMW NineT Forum
User Tag List

 1Likes
  • 1 Post By JeffsBMW
 
LinkBack Thread Tools
post #1 of 10 Old 04-13-2019, 06:14 PM Thread Starter
Junior Member
 
Join Date: Apr 2015
Location: Seattle
Posts: 26
(Thread Starter)
battery drain.. not sure what it is

Hi Guys,

had a bike since they came out. wondering if anyone has heard of stories of a constant battery drain on the bike?

I took my bike in twice for battery issue. I told them I can tell something is wrong, the cranking doesn't sound right and feels like a lack of power.. they tested I guess the electrical charging system, nothing wrong, it's in my head.. second time a guy brought the bike to the shop for fluid change, was there a week and battery was dead when he went to pick it up, they thought it was a dud battery that we just replaced... I finally got my bike off the boat from shipping to Hawaii, and again battery was dead with a new BMW battery...

so something is wrong.. I'm just not sure where to begin or if anyone has had this issue, seems so odd.

any opinions, directions, help, advice appreciated!
athens is offline  
post #2 of 10 Old 04-14-2019, 04:04 AM
Senior Member
 
Anzac's Avatar
 
Join Date: Apr 2017
Location: Vancouver, Wa
Posts: 159
I always keep mine on an Optimate 4 charger and always leave my bikes that way to help keep the battery in good shape.

Do you have an alarm? They have been know to drain the battery. The R9T is a pretty basic motorcycle without a lot of electrical goodies so that should not be happening.
Anzac is offline  
post #3 of 10 Old 04-14-2019, 10:29 PM
Senior Member
 
LoRez's Avatar
 
Join Date: May 2015
Location: Toronto, Canada
Bike: Classic
Posts: 368
There is always some parasitic drain on the battery, as is the case with all modern vehicles.

What kind of interval are you talking about, a week, or a month without charging or running?

Have you added anything to the electrical system or have anything plugged into the accessory socket on a regular basis?

You can check for yourself if there is an unusually high drain on the battery, but it requires getting to the battery with a multimeter.
LoRez is offline  
Sponsored Links
Advertisement
 
post #4 of 10 Old 04-15-2019, 05:52 AM
Senior Member
 
Join Date: Jul 2014
Posts: 204
A USB adaptor will do it

If you leave a USB plugged in it will drain the battery as it does draw current even with out something plugged into it. Also the '14 and early '15 got a lower cranking amp battery from the factory, you should get the higher cranking amp battery.
Dauphinais likes this.
JeffsBMW is offline  
post #5 of 10 Old 04-17-2019, 03:23 PM Thread Starter
Junior Member
 
Join Date: Apr 2015
Location: Seattle
Posts: 26
(Thread Starter)
Thanks guys. I mean serious. We had a new battery installed. Got immediately shipped on a boat to Hawaii which was 2 weeks. Battery was dead on arrival.

I have nothing plugged into the bike. No USB. No nothing. Only some pigtails for a ctek charger and a SAE plug ( battery tender brand ) that’s the only thing I can think. I do know the blinkers were changed before I got them. I got a led back light on the bike. I can’t think what could possibly drain the battery.

This same thing happened to the first battery. It would maybe be dead In a Week if I didn’t put it on a charger everyday.
athens is offline  
post #6 of 10 Old Yesterday, 07:44 AM
Senior Member
 
kebo's Avatar
 
Join Date: Jul 2015
Location: Slovakia, Europe
Bike: Classic
Posts: 1,230
Garage
As others mentioned, be sure that you do not leave anything in 12V plug. CanBus is checking time to time what's in. I left there (by accident) Navi holder (without Navi!), so there should be almost 0 current taken, but it drained my battery to almost 0 capacity in couple of days. Lesson Learned...


-----------------------------------------------------------------------------------
RnineT, FJR1300AE, F3 800, R1200RS, XJ6S, G650GS, CMX500, XL125V
kebo is online now  
post #7 of 10 Old Yesterday, 12:37 PM
Senior Member
 
ignatius J.'s Avatar
 
Join Date: Sep 2018
Location: Oakland, CA
Bike: Pure
Posts: 108
Garage
Quote:
Originally Posted by kebo View Post
As others mentioned, be sure that you do not leave anything in 12V plug.
Not to say you're wrong, but I've had my USB adapter w voltmeter in that plug for about 6 months with no battery issues whatsoever. Voltage always where it's supposed to be. I ride almost every day on a 2018.

I share this info to learn more. Why am I not experiencing any issues? Or am I draining my battery in a way that I'm not able to measure by V alone? I rarely use that port so I'd have no problem unplugging if need be. Thanks!

2018 BMW R nineT Pure
Oakland, CA

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
ignatius J. is online now  
post #8 of 10 Old Yesterday, 01:50 PM
Super Moderator
 
BaldyDave's Avatar
 
Join Date: Jul 2014
Location: Central Belt, Scotland
Bike: Classic
Posts: 9,236
Garage
I think it depends on the accessory connected to the socket. The bike's CANBUS system checks the accessory socket and is meant to shut power down after a minute or so, unless it's told to stay alive (My Optimate 4 charger apparently does this - don't know how though), however my Garmin 590 has power removed by it a minute after the ignition is turned off. Some accessories may somehow confuse the bike into leaving the socket active and this is when flat batteries happen.

Unplugging any accessory from the socket would be the first thing I'd try if I was having battery issues.

Just my thoughts, I'm by no means an expert.

Best practice would be to remove any accessory from the socket unless you know for sure how the accessory socket will behave.

Today I'll be mostly riding.....

2014 BMW R NineT

1979 Moto Guzzi MK1 Le Mans (950 conversion, proddy race engine)

Last edited by BaldyDave; Yesterday at 01:54 PM.
BaldyDave is offline  
post #9 of 10 Old Today, 02:51 PM
Senior Member
 
LoRez's Avatar
 
Join Date: May 2015
Location: Toronto, Canada
Bike: Classic
Posts: 368
Since you are replacing the battery, it would be a good idea to check for an unusually high parasitic drain.

When you have a known good battery, put a multimeter in line between the bikes main ground and the battery ground, with the bike OFF.

IMPORTANT: Do not key on the bike, honk the horn or try to start it with the multimeter inline. (unless you hate your meter and want to buy a new one after you fry it)

With the multimeter set to DC Amps, start at 20 or 10A range, measure and go to a smaller range from there if needed.

If you get a reading higher than a 50mA draw, you have an electrical problem on the bike and you need check individual components.

Anything added aftermarket would be a good start. Unplug one by one and see if the mA reading drops.

When it does, you've found your culprit.


If not, then maybe you are just having incredibly bad luck with batteries (try a different brand?).

This can be a very time consuming, and costly process, so your garage may not have wanted to spend the time on it.
Much cheaper and fast for them to swap the battery and tell you everything is fine.

Happy hunting!
LoRez is offline  
post #10 of 10 Old Today, 08:52 PM
Senior Member
 
Fred Gassit's Avatar
 
Join Date: May 2017
Location: Home of the Bard, UK
Bike: Racer
Posts: 102
+1 for a multimeter check of the parasitic current drain.
Sometime last century I worked on vehicle security systems, and a dark current of even 10mA is sufficient to flatten your battery if left for a couple of weeks.

/// Motorrad
Fred Gassit is online now  
Reply




Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome