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Author Topic: Battery tender?  (Read 3676 times)
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« on: January 15, 2008, 09:04:53 AM »

So after having to put the duc on the charger twice so that i had enough juice to start it so it didn't sit for too long without running and to keep the tires from getting flat spots i decided I needed some sort of bat. tender!

I found at a local hardware store a float charger (for about $6), i bought it and i was wondering if anyone had any experience using them on their bikes before? is it safe to just leave on 24/7 or will it hurt my bat.? or does anyone have suggestion on a better way of going about this?

I was also wondering about how long does everyone elses bikes sit before the bat. dies or doesnt have enough to start their bike?
Uncle Mofo
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Must Win Track Day!

« Reply #1 on: January 15, 2008, 09:12:31 AM »

I never used one, and I went two years on my previous bike without any problems.
 A dedicated motorcycle battery tenter as far as I know charges you battery fully and then trickle charges without causing arm to the battery if left plug in 24/7   

2007 Red S4Rs 2008 Great Lakes Ducati Rally & Track Fest People's Choice Award Winner. 2014 Monster Challenge 3rd Place
2005 S2R Dark  2007 Ducati Day Daytona People's Choice Award Winner (sold)

"Must win track day".  Uncle Mofo Racing

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« Reply #2 on: January 15, 2008, 09:23:13 AM »

Make sure that the one you buy is 12 volts and puts out no more than 1.5 amps max.  I bought one at advance auto for around $12.00.

Bryan is exactly right in that they do trickle charge to between 0.2 - 0.5 amps after the battery is fully charged. It's not really complicated how it does this, just hard to explain.

For safe measure, it is best to remove the battery from the bike, then charge it...since I don't know anyone that does that (including myself) just disconnect the negative lead from the battery terminal and tie it off so that it won't touch the charger. This is a good idea since the charger is pluged into a 120V receptacle and is could receive lightning strikes and power surges - one of those hits your electrical system...and well...just undo the black lead.

A meatball on a spaghetti...

2003 Ducati 999 (Hell yes its Yellow)
2001 Ducati 996 (Yellow/White) 2001-2009 RIP
2003 KTM 450 SX (sold)
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« Reply #3 on: January 15, 2008, 09:28:51 AM »

I bought a genuine "Battery Tender" brand charger.  It was about $35 as I recall from Ca-Cycleworks but I'm sure you can get them a lot of places.  Mine has a pigtail that hooks to the battery while it's mounted in the bike.  The pigtail has a fuse to protect against shorts/surges and an SAE connector on the end.  The charger is a transformer box that plugs into an outlet and has a 15 foot cord that has an SAE connector on the end to plug into the bike's pigtail.

A side benefit is that there are accessories, such as the heated vest I have, that can run off of the SAE connector on the pigtail while I'm riding.

I've kept the bike on the charger for months at a time and always store the battery in the bike.  This has worked well for me and I've heard it recommended by others.  It may be the same thing as a $6 trickle charger but I'd feel more faith in mine and I don't mind paying a few bucks more for the piece of mind I get.

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Yeah, whatever !

« Reply #4 on: January 15, 2008, 11:29:35 AM »

I've got the Yuasa Hot Shot. Mine came as Bryan said with the leads that connect to the battery. Mine also came with little clamps also on a separate pigtail that I've used on my lawnmower.

Mine has 3 LED's on the front to show the unit has power, it's charging and that it's floating. It's low enough amperage that it takes about 2 days to recover a battery from a full dump, so you won't have to worry about cooking it off.

Rat Bike award winning "Project: Terremoto" - '99 M750
Stanotte ceniamo all inferno  
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« Reply #5 on: January 15, 2008, 03:17:33 PM »

the one i have is a 12v with a 1.5amp float it is from chicago electronics/electric. I figured it was cheap so i would give it a try!
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« Reply #6 on: January 16, 2008, 05:03:12 AM »

I bought a genuine "Battery Tender" brand charger...

Yeah, what he said.  i bought one when i bought my first bike and have just bought a new pigtail for each bike since.  with the new baby, it's been really nice to know that when i can get out and ride, i won't have to worry about a dead battery stopping me from enjoying my time.

"Speed has never killed anyone - suddenly becoming stationary, that's what gets you."
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« Reply #7 on: January 19, 2008, 01:58:53 PM »

Make sure that whatever you buy, that it has a float charge built in (no charging after full charge, but starts trickle charging again after a couple of tenths drop in voltage). A few years ago I used one that I assumed had this, but found out too late that it didn't. Wound up boiling the battery on the SS. Battery acid is no friend of frame paint.   

2000 SS900
2007 SBK1098 sold to bluederp

I think MTV should consider using subtitles. Half the time, even I can't understand what the f*** I'm talking about."  -Ozzy Osbourne
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« Reply #8 on: March 31, 2008, 10:51:52 AM »

I have a "BatteryMINDer" from desmotimes .com,  LT S. says it works better and will last longer.
So far it works great!
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« Reply #9 on: May 02, 2008, 01:13:36 PM »

Another vote for Deltran's Battery Tender.  The battery on my VFR has survived 3 winters here in South Bend, and a couple in LA, and works just fine.  I just got my Duck running again (new battery), and it's on a BT, as well.

On both my bikes, I installed a BMW accessory socket, with a BMW plug on the charger lines.  This allows me to hook up my Giali heated vest using the same socket.  Any time I'm not on the bike, and I don't ride much anymore, it's on the BT.

94 900SS with 58,000 miles.
98 VFR with way fewer miles.  Smiley


1994 900SS/CR with Ohlins shock and SP forks.  58,000 miles. 
1998 VFR

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