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Battery Tender tale of woe

10 posts Started 2 Dec 2011 Last recovered post 14 Dec 2011 Wayback Machine snapshot 1 Nov 2013

#1
Hi all - it's been awhile since I've checked in...

Living in California, winterizing my bikes consists of riding them year round. On the occasion that I let them sit for any length of time, I try to fire them up at least once a month. I took out "Pretty Red" (my '97) and hit the starter button and all I got was a fast clicking noise, which I immediately assumed was the starter not fully engaging.

Pretty Red is attached to a Smart Battery Tender (SBT) when in the garage and I have a volt meter mounted near the ignition switch showing a constant display. Oddly, it is showing 12.2 volts on what should be a fully-charged battery... and even that should be enough to kick over the starter. My guess now is that it may read 12.2v but the amperage must be low (that's the extent of my electrical knowledge -- i.e., it's not the voltage but the amps that'll kill ya).

I hooked it back up to the SBT and it read 12.8. It should read 13.0-13.1. So I figure the battery has gone ka-put. It is about 4 years old, so no surprise there.

Every once is awhile, I try starting her up just for the hellofit and get the fast click. Then, one day, she fires up! Woo Hoo! Except, I don't dare ride her. If I stop on a flat surface and she doesn't kick over, I'm hosed.

Still the volt meter reads 12.8 when I hook it back up. It won't take or hold a full charge so, it is clearly time to buy a new battery.

I set up the new battery and install it, then hook up the battery tender. 12.8v! (???) Okay, perhaps it'll read full in a few hours. Nope. Now I suspect there's a short in the system, draining the battery as it is charging. I disconnect the battery from the bike, but re-connect the SBT so that it and the battery are alone to themselves. I figure I'll check on it the next morning. I leave the garage with the SBT red light blinking indicating enough charge to go, but not fully charged.

So what do I see this morning? Red light blinking, 12.8v on the meter. Dang.

Fortunately, I have another, older SBT that I can swap out the plug connector for one with battery clamps on the end. I disconnect the newer SBT and clamp the older SBT leads to the new battery and the volt meter reads: 13.1v.

Sheesh! It never would have occurred to me that the 12.8v reading was all the newer SBT was putting out (i.e., the SBT is ka-put).

I guess the moral of the story is, when you see hoof prints, look for horses (like I did), but don't rule out zebras.
#2
Unhook the batt from the bike and hook up the tender to the batt......... it can take more time to charge a new batt...... New batt should be fully charged before using.... This will also tell you the truth about the batt........

By then someone will give you more details.........
#3
A multi-meter is always nice to have..... Can buy cheap at Harber Freight........
#4

Unhook the batt from the bike and hook up the tender to the batt......... it can take more time to charge a new batt...... New batt should be fully charged before using.... This will also tell you the truth about the batt........

By then someone will give you more details.........


Thanks - I did unhook the battery: " I disconnect the battery from the bike, but re-connect the SBT so that it and the battery are alone to themselves." The initial charge on the new battery read 12.7 prior to hook up. 12+ hours on the charger never got it above 12.8. 1 hour on the replacement charger got it up to 13.3. It's definitely the charger that is bad.

I have a multi-meter I always carry (Always! but that's another story). But recall, I have a constant read volt meter on the bike, so although I haven't done it, I'd bet the tractor, barn and house that the multi-meter is going to read 12.8v coming off the bad charger.
#5
Good.Sounds like the Old charger..... Hope that's it.....Good luck.
#6
Sounds like you need to re-label your charger to "NSSBT" Not So Smart Battery Tender.

But seriously, Thank you for the post, and it serves to remind us that, when dealing with electricity, it does not work by magic, All the odd things that happen do actually have a logical explanation, We just gotta keep looking in different places to find them, sometimes.

Tom
#7
What happens if you read the battery alone, after disconnecting the charger and letting it sit for a few hours? I'm not sure what reading the charging voltage will tell you. Did Deltran tell you that the charging voltage for the SBT should be over 12.8v? Battery resting voltage of 12.8v indicates a good battery. So, assuming the BT were truly "smart", why would it even try to charge a fully charged battery?

I think your old battery was bad; I'm not as convinced that your SBT is bad...

Ciao,
#8

Sounds like you need to re-label your charger to "NSSBT" Not So Smart Battery Tender.

But seriously, Thank you for the post, and it serves to remind us that, when dealing with electricity, it does not work by magic, All the odd things that happen do actually have a logical explanation, We just gotta keep looking in different places to find them, sometimes.

Tom


You will have a hard time convincing me that is not Magic. The best explanation I ever read was: electricity=FM (fcuk'n majic)
#9
A battery can read decent voltage and still not put out much or any amperage. Good idea to get a Proven battery also, lot less Problemo for the longest period of time.
#10



it serves to remind us that, when dealing with electricity, it does not work by magic,
Tom


You will have a hard time convincing me that is not Magic. The best explanation I ever read was: electricity=FM (fcuk'n majic)

I hear ya,
It is a bitter pill to swallow, but by my experience, it is pretty much proven,
although there has been a time or two when I have considered consulting a witch Doctor :o)
End of thread · 10 posts recovered Wayback Machine snapshot 1 Nov 2013