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  1. #1
    Registered User jsouth's Avatar
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    New Odyssey PC680 battery!

    I finally retired my old Odyssey and bought a new one. The old one was on the bike when I bought it in February 2011, and has worked for 6.5 years and 30,000 miles after I bought the bike. Even after rejuvenating it this spring, it would not start the bike any more by late summer.

    Got the new one in and it works like a champ. As I had old and new side by side, I noticed what I think is a date code on the sticker on top of the battery. It appears my new battery was manufactured in 6/17 and the one that came out in 10/04. If true, that's not a bad service life for a motorcycle battery -- even if installed 4 months after manufacture, it worked for 12.5 years.

    I'll take those odds!

  2. #2
    Day Dreaming ... happy wanderer's Avatar
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    They really are well made batteries. It may have lasted even longer with a higher voltage regulator on the alternator. Stock is around 14 volts but the Odyssey prefers around 14.7 to keep it in top shape and prevent any sulfation which is what eventually kills them. That is still pretty good performance though considering we used to be happy with 2 or 3 years with flooded lead acid cells. Even they can last quite a long time with proper maintenance though.
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  3. #3
    Registered User jsouth's Avatar
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    I have the regulator, but have not yet pulled the alternator to install it. I do use a charger (CTEC 4.3) which does the proper charging voltage.

    Looking back through the service records, if that date code was right, the battery has seen over 70,000 miles in 12.5 years.

  4. #4
    Registered User roger 04 rt's Avatar
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    I just bought an R1150GS with a PC680, I ran the battery through four full recharge cycles and it now takes 10% more charge than when I bought it. And I've started charging it with a correct battery charger, but I haven't modified the VR yet.

    After a 45 minute ride--being charged at 13.7V--when I connect it to my 14.7V charger, it immediately draws 2-3amps and takes about an hour to get to 100% charge. This is a pretty good indication that the stock VR can't do the job.

  5. #5
    Day Dreaming ... happy wanderer's Avatar
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    Quote Originally Posted by roger 04 rt View Post
    I just bought an R1150GS with a PC680, I ran the battery through four full recharge cycles and it now takes 10% more charge than when I bought it. And I've started charging it with a correct battery charger, but I haven't modified the VR yet.

    After a 45 minute ride--being charged at 13.7V--when I connect it to my 14.7V charger, it immediately draws 2-3amps and takes about an hour to get to 100% charge. This is a pretty good indication that the stock VR can't do the job.
    I've been too lazy to modify mine but I put the RT with the PC680 on my Centech charger whenever I've been on a long trip or just periodically when I'm riding it locally. It does exactly as Roger described. Tops up and finally goes on maintain mode. The PC680 on my R80G/S fares better as I installed an adjustable regulator and set it to around 4.5VDC. I should just set it to 14.7 but I thought I would start there and see what happens. It takes significantly less time to top up than the RT one does.
    MJM - BeeCeeBeemers Motorcycle Club Vancouver B.C.
    '81 R80G/S, '82 R100RS, '00 R1100RT

  6. #6
    Registered User PAS's Avatar
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    I will agree about getting the recommended charger for the PC-680! I have one in my 81 R100RT and 03 R1150RT and keep them topped off. The 81 has a higher charging rate then the 03 oddly enough.

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