Originally Posted by Plane Dr
Thanks everyone! Nice to have actual testing of other bikes.
So I spent the day mucking about. The Odyssey after a deep discharge (possibly too deep) it now tests 265 cca vs 230 cca a couple days ago. It also holds a solid 12.8 volts. The process was to draw down to 10.5-11 volts then recharge at 10+ amps, then trickle charge at 1.5-2 amps for 6-8 hours. I had wired my LED spot to it and it sucked way low. So it got a 2 stage (3.5-4 hour total) 10 amp charge then the trickle.
The starter post was 8 years old. So cleaned and retorqued. It was okay for corrosion and wasn't loose but wasn't clean and tight.
The centech AP2 was "leaking" on the switched side of the circuit. It was always 6 ish volts. i only noticed as the Piaa switch LED was still on after the circuit was supposed to be off. I Disassembled and cleaned it, essentially just brushing it down with a dry toothbrush and paintbrush.
End result 6-7 milliamperes for the main system, 13-14 for the centech circuit. 6 milliamperes of which go to the new voltmeter and clock. 6-7 into the ether, relays, hard wired transformers etc.
Ill see what happens. It spins up faster than it has anytime since I bought it. Ill see if the battery holds. But I am around 1/3 the previous draw. So this should get me 7-10 days and still start. It sits that long only if I am traveling for work so it should be good. I may see what the dealer costs to verify the software rev level. Mine is a 2004 build and is a 2004 based on all the details, 2005 though on the data plate.
Hopefully some good data here for someone else in the future.
Great to hear your progress.
If you really want to bring the battery to full capacity you can do the following:
(you will need an 18v current limited power supply)
Out of the Odyssey manual:
1. Bring the battery to room temperature—25°C (77°F)—if it
is not already there.
2. Measure the open circuit voltage (OCV). Continue to step
3 if it measures at least 6.00V.
3. Charge the battery for 24 hours using a constant current
charge that is 5% of the 20-hour capacity of the battery
(5A for a 100Ah battery). The charger should be able to
provide a driving voltage as high as 18.00V. Monitor the
battery temperature; discontinue charging if the battery
temperature rises by more than 20°C.
4. Allow the battery to stand for 18 hours after completion
of step 3.
5. Perform a capacity test on the battery and record the
amp-hours delivered. The longer the discharge the more
reliable the result. This is Cycle 1.
6. Repeat steps 3 through 5. The capacity noted in step 5
is the Cycle 2 capacity. Proceed to step 7 only if Cycle
2 capacity is greater than Cycle 1 capacity; otherwise
replace the battery.
7. Repeat steps 3 through 5 to get Cycle 3 capacity and
proceed to step 8 only if Cycle 3 capacity is equal to or
more than the capacity in Cycle 2. Replace the battery
if Cycle 3 capacity is less than Cycle 2 capacity. If the
capacity is greater than or equal to 80% of the rated
capacity of the battery it may be returned to service.
8. Recharge the battery and put back in service if Cycle 3
capacity is equal to or exceeds Cycle 2 capacity.
I have managed to bring back several "failed" Odysseys using this method, it works really well