Another.... do I need to replace my battery? - Wrist Twisters
 
Thread Tools Display Modes
post #1 of 6 Old 01-27-2013, 08:16 PM Thread Starter
Tirone
 
Join Date: Aug 2012
Location: Jersey City
Posts: 39
Rep Power: 1
 
Another.... do I need to replace my battery?

Hey All.
So my battery died a couple of months ago when I leaving to go home from work. It was coldish out (~40*f) and I had my HIDs on when starting the bike, so I thought it was that. I was able to jump it but it happened again the following week. I had been doing sporadic testing of the battery, and yesterday I finally bought a cheap multimeter.

These were my results:
13.5 volts when fully charged by battery tender.
12.5 v under full load (lights, not running)
14.5 v with engine running.
About 30 seconds (maybe less) of starter motor going (engine not running) before the battery dies and the solenoid switch starts clicking (does it have a solenoid?). Voltage dropped from sub 11 v to almost nothing. Also it took only about 30 minutes to recharge that dead battery to full using the battery tender.

It looks like I need a new battery, but I guess I need some affirmation before I drop $130 for a Shorai battery.

Any comments?
Thanks in advance.

2003 919
Yoshimura TRS
Power Commander
Renthal UL
Tower is offline  
Sponsored Links
Advertisement
 
post #2 of 6 Old 01-28-2013, 02:37 AM
rmb
Let's go!
 
rmb's Avatar
 
Join Date: Aug 2009
Location: Sussex Couty NJ
Posts: 7,650
Rep Power: 1
 

Awards Showcase
Wrist Twisters Event Attendance Wrist Twisters Event Attendance Wrist Twisters Event Attendance Wrist Twisters Event Attendance 
Total Awards: 9

Yep, I'd say you need a new battery.

rmb is offline  
post #3 of 6 Old 01-28-2013, 06:54 AM
Serial Monogamist
 
ST-DocLizard1's Avatar
 
Join Date: Dec 2007
Location: Hampton, NJ
Posts: 1,507
Rep Power: 1
 

Awards Showcase
Wrist Twisters Event Attendance Wrist Twisters Event Attendance Wrist Twisters Event Attendance Wrist Twisters Event Attendance 
Total Awards: 21

I concur. Looks like a new battery is in your future



"FRIENDS DON'T LET FRIENDS EARLY APEX."
ST-DocLizard1 is offline  
 
post #4 of 6 Old 01-28-2013, 07:55 AM
"Whose ABBA ZABBA?"
 
Bigdaa's Avatar
 
Join Date: Jan 2006
Location: Goleta, California
Posts: 17,129
Rep Power: 1
 
14.5-15.5 somewhat normal alternator output.

If you leave it on full load, not running, how fast does the voltage drop?

Cutting to the chase, how old is your battery to begin with?



Also: Folks, a multi meter is an invaluable item and addition to your shop.

I suggest not sparing the money and getting a quality one for the long run.

I have had my Fluke 77 DMM since the mid 80's and it has served me well to this day.


In my opinion, the M1 rifle is the greatest battle implement ever devised.
General George S. Patton
Bigdaa is offline  
post #5 of 6 Old 01-28-2013, 09:13 AM Thread Starter
Tirone
 
Join Date: Aug 2012
Location: Jersey City
Posts: 39
Rep Power: 1
 
[QUOTE=Bigdaa;538149]14.5-15.5 somewhat normal alternator output.

If you leave it on full load, not running, how fast does the voltage drop?

Cutting to the chase, how old is your battery to begin with?



I got the 9er last season and I dont know how old the battery is. Its a Motocross Platinum, which I think is a mid tier Yuasa AGM battery. I dont tend it but during the riding season I ride it every weekend.

From memory, I think the voltage dropped quickly from 13.5 to 11.5 and stayed there for a bit. I recall seeing it drop 0.01 volts from there every couple of seconds or so. I have really bright HIDs. I started it before it dropped too much because I hadnt done the alternator portion of my diagnostic.

2003 919
Yoshimura TRS
Power Commander
Renthal UL
Tower is offline  
post #6 of 6 Old 02-18-2013, 01:34 PM Thread Starter
Tirone
 
Join Date: Aug 2012
Location: Jersey City
Posts: 39
Rep Power: 1
 
I finally got the Shorai battery. Model no LFX14A4-BS12. Its real light but it's about the same size as my old one. I thought it'd be much smaller. Interesting instructions: if storing for a while, keep it refrigerated. And most interesting... Do not allow charge voltage in excess of 14.8 volts. Interesting because my alternator puts out 14.5 volts. Mmkay. Little close for my comfort but OK.

Let's see what happens after I install it.

2003 919
Yoshimura TRS
Power Commander
Renthal UL
Tower is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Wrist Twisters forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may 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 Off
Pingbacks are Off
Refbacks are Off

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