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Old 11-12-2012, 03:31 PM   #1
lqgsrider OP
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2009 GSA battery tender?

My brother just purchased a 2009 GSA with a OEM battery. What type battery tender would you recommend?
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Old 11-12-2012, 03:56 PM   #2
Girthy Knobkers
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Optimate 4/5 great for battery maintenance/tending
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Old 11-12-2012, 07:41 PM   #3
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I've been using this Since I bought my bike. Works like a champ, and relatively inexpensive. I bought mine at Alaska Leather (local for me) I think I've seen them at Wally World too. Can't go wrong
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Old 11-12-2012, 10:06 PM   #4
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Deltran Customer Service

Here's a recent exchange I had with Deltran;

Comment: Hello,
I would like to purchase one of your units to maintain the Gel battery in my BMW motorcycle. I see product #021-0156 seems to be gel specific but the smaller unit #021-0123 also lists gel batteries. Which should I order? I prefer the smaller unit but don't want to harm my $200 BMW battery. Any help would be appreciated.


If you have an Exide brand battery, then you would need to purchase model 021-0156. If it is not the Exide brand battery, then the Junior model should work fine for you as long as you do not have a lot of parasitic draw on your battery.


Dawn Christian
Customer Service & Support
Deltran Corp.
801 International Speedway Blvd.
DeLand, FL 32724
The model listed above is specifically programmed for gel batteries.
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Old 11-12-2012, 10:40 PM   #5
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That's kind of wanting to know the best ice cream flavor...

Here's another choice: CTEK Multi US 4.3

I have the US800 model, but I'd like to get the US4.3 model because of this:

  • Fully automatic charging and maintenance in 8 steps maximizes battery life and performance
  • Numerous accessories simplifies using the same charger for multiple batteries
  • One charger for the car, motorcycle, lawn mower, snowmobile, sump pump and tractor
  • Water-resistant so that the solution could be taken to the problem even if it rains or snows
  • Patented maintenance charge for a unique combination of maximized life and performance
  • Recondition of deep discharged batteries
  • Patented desulphation that extends the battery life
  • No sparks, short-circuit proof and reverse-polarity protected for untroubled usage
  • Automatic detection of end-of-life batteries that eliminates surprises
The only thing I can say is a downer is that these chargers are only water-resistant / they are not water proof.

The other recommendation from tech support is:

All CTEK chargers have a very tight control on Voltage and will not damage your Can bus system.
The only issue that can occur is if you go through the can-bus power outlet. There is no risk of damage to the system but since the CTEK charger shuts off all power in its advanced battery maintainer mode, the can bus system sometimes locks the charger out from resuming charging if the battery needs more.
The way to avoid this would be to go directly to the battery with the CTEK quick connect. This would eliminate any issue of conflict with the can bus system.
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Old 11-13-2012, 06:56 AM   #6
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Optimate 4 Dual Program

Will work on whatever kind of battery you have. Has a CAN-BUS mode and a non-CAN-BUS mode. So, it will work fine plugged into the Powerlet outlet on your bike.

Works great on my '09 GS.
FS: 2009 BMW R1200GS, '05 GSX-R1000
Iron Butt # 4999, (former) WERA/CCS EX # 666, AMA Life Member, Drummer, Bassist
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Old 11-13-2012, 07:38 PM   #7
lqgsrider OP
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Thanks good info
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