Author Topic: Battery State of Charge  (Read 1339 times)

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Offline Peter

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Battery State of Charge
« on: May 23, 2011, 12:29:55 pm »
I've noticed that after sitting for 3 or 4 days, the battery display indicates 12.4 volts with the engine off.  According to the manual, the battery should be charged if under 12.6 volts.

I did disable the "warning light" from blinking and after some riding, the battery then displayed at 12.7 volts with the engine off.

Are those that have had their bikes for a while finding a need to have a Battery Tender hooked up to maintain proper voltage?

1993 Honda CBR1000F
1998 Triumph Adventurer
2011 C14 ABS
COG member # 769

Offline Fred_Harmon_TX

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Re: Battery State of Charge
« Reply #1 on: May 23, 2011, 01:13:33 pm »
I typically keep some sort of automatic trickle charger hooked up to my bikes when I'm not riding just as a matter of habit. Batteries will self discharge on their own, and many newer bikes have a small parasitic drain from clocks and various systems on the bike that also don't help. The hotter the temp, the more important it is to keep a charger on them, as the self discharge rates on lead acid batteries goes up with temperature, and if a lead acid battery is left in even a slightly discharged state for any length of time, it begins to sulfate, which depletes its lifespan and capacity.
Fred H.

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Offline bob14

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Re: Battery State of Charge
« Reply #2 on: May 24, 2011, 05:37:16 pm »
agreeed I always have mine hooked up except earlier in the year I cleaned up the garage and unplugged it to sweep.
Had it off for an unknown amount of time showed 10.6 and still started .
Bob Mason  Albuquerque New Mexico  08 Concours 14  05 Triumph Tiger  84 GPZ1100  74  750 Kawa MachIV  71  500 Kawa MachIII

Some people try to turn back their odometers. Not me, I want people to know "why" I look this way. I've traveled a long way and some of the roads weren't paved.