Dead Battery - BMW G310 R/GS Forum
 
LinkBack Thread Tools
post #1 of 9 (permalink) Old 09-14-2018, 12:37 AM Thread Starter
Member
 
Join Date: Sep 2017
Location: Kota Bharu, Malaysia
Posts: 46
Dead Battery

After 13k km..my 310 gs battery had lost charges..

https://youtu.be/bNbZ52wfzK4

i call dealer this morning..dealer ask me to send my motor to the shop..& claim it under warranty..

the dealer also said that this is not the first issue of the dead battery.
imedemit is online now  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 09-14-2018, 01:04 PM
Member
 
Join Date: Dec 2017
Posts: 82
Do you have a USB phone charger connected to the bike's battery?
WillyR50S is offline  
post #3 of 9 (permalink) Old 09-14-2018, 03:06 PM
Senior Member
 
Join Date: Jul 2017
Location: Escondido, Caifornia ( 36 Miles north of San Diego )
Posts: 153
A typical USB phone charger even with a lit LED will only draw about 14mA that would mean you would have to leave it plugged in and not run your bike for about 2 weeks for any noticeable drop in battery power. I leave mine in 24 / 7 and it has an LED on it that is on constantly ( looks like an alarm and night ), I have almost 13,000 miles on my bike and have never noticed or had a low battery. I ride my bike almost daily and have not let it sit without riding for more than 3 to 4 days.
Zente is offline  
post #4 of 9 (permalink) Old 09-14-2018, 07:24 PM Thread Starter
Member
 
Join Date: Sep 2017
Location: Kota Bharu, Malaysia
Posts: 46
yesterday, i open the battery from it casing and clean the terminal..then, i attach it back. Now, the display counter an error and sign on service.

https://youtu.be/LT8qIiIZTjM
imedemit is online now  
post #5 of 9 (permalink) Old 09-14-2018, 10:00 PM
Super Moderator
 
Cees Klumper's Avatar
 
Join Date: Mar 2018
Location: Marina del Rey, California
Posts: 300
Garage
Send a message via Skype™ to Cees Klumper
Possibly a bad battery or fault in the charging system. Or a loose cable/wire.

2018 G 310 R, 2016 C 650 Sport and 1976 (!) Yamaha XS650
Cees Klumper is online now  
post #6 of 9 (permalink) Old 09-14-2018, 10:24 PM
Senior Member
 
Join Date: Oct 2016
Location: Montreal, Qc, Canada
Posts: 134
Probably the date has to be reset...happened to me
bbbelanger is online now  
post #7 of 9 (permalink) Old 09-15-2018, 03:23 AM Thread Starter
Member
 
Join Date: Sep 2017
Location: Kota Bharu, Malaysia
Posts: 46
Quote:
Originally Posted by bbbelanger View Post
Probably the date has to be reset...happened to me
aahh..why im not thinking about this..i will try it..thank you bbbelanger
imedemit is online now  
post #8 of 9 (permalink) Old 09-15-2018, 08:27 AM
Member
 
Join Date: Dec 2017
Posts: 82
Zente,



Not sure where you get your discharge statistics for how long it takes to fully discharge a G310 battery. Many folks have gone on vacation for 2 weeks only to return to a dead battery when having a USB charger in the circuit. Unfortunately, it has usually been dead long enough to sulfate the plates and then the battery has to be replaced. My recommendation to everyone is to have a switch in the circuit or simply unplug the USB charger so that you do not have to risk having to replace a $70+ battery after an extended time of discharging at 14 or 15 mA.



Willy
WillyR50S is offline  
post #9 of 9 (permalink) Old 09-16-2018, 12:42 AM
Senior Member
 
Join Date: Jul 2017
Location: Escondido, Caifornia ( 36 Miles north of San Diego )
Posts: 153
Willy


The battery in the G310 is an 8 amp hr battery at a typical draw ( measured on a multi-meter ) of 14mA ( that is With a Lit LED ) it would require 100 hrs or 4 full days to draw down 1.4 Amp hrs of the reserve power until you get below 50% of your batteries reserve capacity or approx 12 days you would still be able to start your bike. I have done this with cars, trucks, etc and use a standard Lead Acid battery running an inverter that runs a buffing motor at motorcycle shows polishing jewelry etc for multiple weekend events without recharging the battery in between. I have gone over 2 months worth of shows on the same battery charge. My buffing equipment draws far more power than an LED light. I suggest you have some other draws on your system that you can discharge the G310's battery in a couple weeks and destroy the battery. But hey your entitled to your opinion. As stated above I have had my USB Charger in and left on for the entire time I have owned the G310GS ( over 6 months ) I never remove or shut it off.



Try a simple test: Do a nice long run on your bike ( to get a full charge ) - park it - using a volt meter measure your battery voltage - leave it over night and measure it again in the morning - see how much the voltage drops ( oh and use the highest resolution on your multimeter to get the most accurate measurement ). This will give you a baseline.


Now Plug in your USB Charger ( without any attachment ) - leave it in overnight and measure it the next day - the voltage drop will be next to nothing compared to the day before ( be sure that any drop in voltage on the base line is subtracted from your USB test to show only the amount of drop from the USB device and not the system as established in the baseline )



Extrapolate that out for a number of days to see how long it will take to draw the battery down below 12volts.



I believe you will find around 2 weeks is a safe amount and still being able to start the bike.
Zente is offline  
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Bike completely dead, no clue what's wrong thetrash35 2017+ BMW G310 R / GS Complaints, Issues And Problems 53 08-15-2019 05:58 AM
Battery Discharge issue jganoza 2017+ BMW G310 R / GS Complaints, Issues And Problems 7 02-21-2018 06:48 PM

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