Check the voltage required for a tender. I have one and my previous tender was a bit lower than required and it did make a difference. I didn't realize this until I had a conversation with the factory.
From Odyssey Battery Co...:
"http://www.odysseybattery.com/documents/ODYSSEY_approved_12V_chargers.pdf is the link to the approved compatible charger listing linked on the website Literature page. The 6A Schauer CM6A is a relatively inexpensive charger that has been tested and approved for use as both a charger and a maintainer for the PC680 sized battery. Consistent undercharging or maintaining the battery in an undercharged state at less than 13.5V will cause sulfation and premature failure."
From a previous thread....
My two year old Odyssey PC 680 battery would not crank for me this morning. It is almost always on the Deltran Tender when the bike is not in use. Odyssey is saying that the reason my battery died is because the float voltage on the tender is between 13.1 and 13.4 and it needs to be at least 13.5 !
The sent me instructions on how to recondition my Odyssey which I will do today. It involves running the voltage down to about 8 volts with the headlight and then connect the battery to a 10 amp charger for about 6-8 hours or as long as it takes to fully recharge the battery. It is recommended that I recondition it at least two times.
14.4-14.8V with optimum being 14.7V in the absorption and 13.5-13.8V with optimum being 13.6V in the float. Not required for this procedure but for best results. As long as the battery doesn’t overheat to the point of venting, hissing or to where you cannot hold your hand on it (about 125°F) it should be fine. If it does overheat and the charging voltage is less than 15.0V then the battery is sulfated and has a high internal resistance. Discontinue charging and allow to cool completely for 24 hours before attempting to charge again.
Fully charged, the battery will have a rested voltage of at least 12.84V 8-24 hours off charge. Most conventional chargers do well to get the battery to 12.6-12.7V. Charge for 8-10 hours and allow an overnight rest before checking the voltage. Cycle at least two times. More times if it takes longer with each successive discharge to reach 10.0V using the same loads from a full state of charge. Longer run times indicate improved capacity. If you know the loads applied to discharge the battery, you can use the performance chart in the Technical Manual to gauge performance.
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