Did I just brick the PC680 battery? - BMW Luxury Touring Community
 
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post #1 of 15 Old Sep 15th, 2013, 12:50 pm Thread Starter
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Did I just brick the PC680 battery?

Ok, disclaimer right up front, Brainiac I'm not.

My Nav II has systematically been going bad on me. So I had the bright idea of just leaving the thing on and the bike plugged into the tender, between rides. This arrangement has worked for several months, except now this week I forgot to hook up the tender.

So this morning I go out to fire up Airwolf and it's completely dead, I mean no response whatsoever. I plugged in the tender, went for a workout and when I came back four hours later the tender is still flashing as if it's not connected to anything.

So did I kill it? Is there a way to get it back or do I just need to buy a replacement?


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post #2 of 15 Old Sep 15th, 2013, 1:03 pm
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Re: Did I just brick the PC680 battery?

Your tender may not be able to recharge a battery if it falls below a certain voltage. I have one trickle charger where that is 9 volts. Try a charger with 2 or 10 amps capacity to get your 680 back near its 20 amp-hour capacity.

Motor On ,/'


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post #3 of 15 Old Sep 15th, 2013, 1:21 pm
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Re: Did I just brick the PC680 battery?

+1 on the charger. use one of the newer, adjusting chargers. leave it on for 1-2 days. get the stored voltage up high as it will go, then never take it off the trickle.

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post #4 of 15 Old Sep 15th, 2013, 1:34 pm Thread Starter
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Re: Did I just brick the PC680 battery?

So the battery is not permanently damaged if it is deeply discharged?

I hope that's the case, the lowest price 680 I could find is at Apex Battery $114 delivered. Seems a lot more then the last time I bought one.


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post #5 of 15 Old Sep 15th, 2013, 2:24 pm
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Re: Did I just brick the PC680 battery?

there's a high likelyhood-that if it's 'relatively new' (i.e. year or so) that it will recover. but again, emphasizing a good variable charger that will 'fill-er-up' and then taper off when FULL. it may take a few days.

additionally, IMHO-and only MHO- i'd remove it from the bike (label your wires well) and charge it OFF the bike. then reinstall it AFTER it's fully charged.

if it doesn't take the charge from the charger then yes, it's a brick-but i'd wager it's okay.

when you can start the bike and all your wires are connected CORRECTLY and you're ready to get her out of the garage then------put it in gear and RIDE LIKE THE WIND and keep your RPM's up.

GL HIH

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post #6 of 15 Old Sep 15th, 2013, 4:46 pm
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Re: Did I just brick the PC680 battery?

The PC-680 is one of the few that I have seen come back from the dead and live long healthy lives. Steve Rowe's bike came to me with a dead PC-680 and after I found the source of his high current drain I charged the battery with a good 2 amp charger (not a tender) and put it back in service. That was two years ago and it is still going strong.

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post #7 of 15 Old Sep 15th, 2013, 5:28 pm
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Re: Did I just brick the PC680 battery?

All that.... and your alternator puts out 720 watts or 60 amps. A ten amp charger is fine so long as it is a regulated unit. In other words it monitors the voltage and shuts down when the battery tops off.
What will burn your battery up is a non-regulated charger (also known as a constant output unit). These put out a constant amperage and do not shut down when they need to. So a ten amp non-regulated charger will produce heat roughly equivalent to a 100 watt bulb at 110 volts. Ever grab one of those when it's hot? Ouch!!! That 10 amps converts to heat inside the battery once it reaches capacity and will literally melt the case.


Regulated charges =

Non-regulated chargers =


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post #8 of 15 Old Sep 15th, 2013, 5:59 pm
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Re: Did I just brick the PC680 battery?

Mine wouldn't take a week of reconditioning.with a auto-charger that went up to 15 amps I think Mine was 5 months old. Wouldn't hold the charge. Stranded me a few times. Replaced with a new pc680.

I hope it serves me better...

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post #9 of 15 Old Sep 15th, 2013, 7:16 pm
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Re: Did I just brick the PC680 battery?

Concur with the others you didn't kill the battery but you can't bring it back to life with a 'tender'. A dumb charger but you have to time it. Example 2A charger for no more than 9 hours to get it high enough capacity for the tender to maintain it. Better yet get a voltage meter and check it during the process. You should be able to resurrect it just fine.

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post #10 of 15 Old Sep 15th, 2013, 9:33 pm
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Re: Did I just brick the PC680 battery?

If it's a fairly new battery you may be out of luck as it seems the manufacturing quality has declined.
My Odyssey died on its first anniversary, and nothing I did could bring it back to life, including riding over 300 miles. The starter would hardly turn the engine over when I stopped foe gas.

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post #11 of 15 Old Sep 16th, 2013, 12:07 am Thread Starter
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Re: Did I just brick the PC680 battery?

Thanks for all the advice. I put it on an a 3amp charger for about 8 hours. Afterwhich the case felt warm to the touch. I didn't want to leave it on overnight and risk overheating.

The tender is now flashing when hooked up. I'll let it sit for a day or two and see if it goes to green.

Will I have to reprogram the security system? It used to default to a locked mode and required the fob to unlock with each start.


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post #12 of 15 Old Sep 16th, 2013, 7:34 am
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Re: Did I just brick the PC680 battery?

My battery would spike after recharge. I carried a DVM to test voltage. It would be fine 12.75v or more then boom 11volts = no start. I had a load test done it said battery was good 10 mins later I stopped. DEAD checked voltage 11ish volts. I had AAA come and jump me rode 10 mins to a battery store they load tested it GOOD. Rode a while then went home. Next morn bike was DEAD again.
I took it out of bike went to yet another battery store they tested it NFG. Bought a new PC680.
I took a week off following their procedure to restore battery without good results. I wouldn't trust a battery that had drained. I don't recall leaving the lights on or anything or if it was a bum battery. But it sucks getting stranded...

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post #13 of 15 Old Sep 16th, 2013, 11:54 pm Thread Starter
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Re: Did I just brick the PC680 battery?

Quote:
Originally Posted by TeddyTelco
But it sucks getting stranded...
Ain't that the truth!

I kept it on the trickle charge over night then another 8 hours on the 3amp charger. Then back to the trickle charge, this evening I got a green light.

If i was taking a long trip I wouldn't take a chance but I'll see how it performs over the next few weeks. First time it shows any hesitancy to starting the bike it's gone, good test or not.


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post #14 of 15 Old Sep 17th, 2013, 6:09 pm
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Re: Did I just brick the PC680 battery?

I left my lights and engine circuit on during a long lunch break and of course I couldn't start the bike. Roll started and continued on the trip and had no issues. The temp gage read low until the battery got charged going down the highway. I wonder if its a kind of voltage gage.

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post #15 of 15 Old Sep 18th, 2013, 9:09 am
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Re: Did I just brick the PC680 battery?

The manual says "roll-starting" can cause damage to the catalytic converter. Jump it with cables,,,

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