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Thread: battery tender recommendations?

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  1. #1
    Registered User LCBIKEMAN's Avatar
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    Question battery tender recommendations?

    I ride a 2000 R1100 RT with just under 30K miles, the last 1400 mine since I bought it. With dropping temperatures upon us in Northern Virginia, I am seeking thoughts on battery tenders.
    Yes or no - experiences?
    If yes, which one and why? Experiences?
    I have a gel battery of unknown age (on the bike when I purchased it).
    Yes, the RT is my best inanimate friend...I'm not certain she's inanimate.
    Many thanks to you all.

  2. #2
    jingdog
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    My battery tender says no AGM batteries.

  3. #3
    Registered User kgadley01's Avatar
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    Quote Originally Posted by LCBIKEMAN View Post
    I ride a 2000 R1100 RT with just under 30K miles, the last 1400 mine since I bought it. With dropping temperatures upon us in Northern Virginia, I am seeking thoughts on battery tenders.
    Yes or no - experiences?
    If yes, which one and why? Experiences?
    I have a gel battery of unknown age (on the bike when I purchased it).
    Yes, the RT is my best inanimate friend...I'm not certain she's inanimate.
    Many thanks to you all.
    I bought my charger at the BMW shop. good for Gel or acid Batteries. I don't remember what I paid, but remember it being a bit pricey. It says BMW on it and does a great job.

  4. #4
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    Whenever I buy a used bike with unknown age on the battery I just buy a new battery and if I need to a charger matched for that type of battery. That eliminates any surprises.
    '03 R1150R, '03 F650GS, '97DR200SE,'78 Honda CT-90, '77Honda CT-90

  5. #5
    Riding where it's hot! AZ-J's Avatar
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    Battery Tender Plus! It works on all bikes beautifully.
    Last edited by AZ-J; 10-25-2009 at 09:54 PM. Reason: omitted a letter
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  6. #6
    Figaro1100R
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    Powerlet plug

    Quote Originally Posted by AZ-J View Post
    Battery Tender Plus! It works on all bikes beautifully.
    I have a Battery Tender (junior, I think). With the proper plug I can just plug it into the Powerlet receptacle on the side of the bike, right?

  7. #7
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    I have 3 of the Schumacker units from WM.

    I am an electrical engineer and I have actually worked for a battery manufacturer.

    They are a 3 step unit, all the voltages are correct and they do an excellent job on SLA, gell or Flooded. They are a very good value. They abuse the battery much less than the bike alternator.

    There are several things that happen to LA batteries. If they are overcharged, then they lose water, this increases the specific gravity of the acid, and the plates corrode, and the battery eventually gets too weak to work.

    If they are left discharged, over time the sufate crystals grow larger. They can puncture the separators and short a cell. Or they can shed and short a cell. Or they are just unavailable, and the battery gets weak.

    The activation energy to convert a large sulfate crystal, is greater than the charger delivers, there are pulse chargers that can do it. The Schumacker unit does not do this, and if you keep your battery charged reasonably well ( >80%) you never will need to.

    However you can buy that kind of charger too, but to be honest, unless you like walking in MC boots, just buy a new battery. They cost less than a tire.

    Using a tender ever night, is overkill unless you have a bike with too small an alternator for all your lights and gear. Using it if shut off for a week, or 2 is over kill. If not going to drive for a month or more, then use the tender.

    I check mine with a voltmeter every so often, and one did fail and overcharge a bit, it was on a trolling motor battery so it was overloaded, I do not use on that any more.

    Schumacker rocks.

    Rod
    Last edited by ragtoplvr; 11-13-2009 at 05:22 PM. Reason: note, run spell check B4 hitting save.

  8. #8
    Riding where it's hot! AZ-J's Avatar
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    Quote Originally Posted by Figaro1100R View Post
    I have a Battery Tender (junior, I think). With the proper plug I can just plug it into the Powerlet receptacle on the side of the bike, right?
    This only works on a non-CanBus bike. It will not work with a Canbus bike. As I have the BT Plus, I use a SAE pigtail from the battery. It works like a charm.
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  9. #9
    Registered User LCBIKEMAN's Avatar
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    thanks

    I have found the correct tender to use with my battery...thanks for your comments... anyone use a "Battery - Tender" brand versus the BMW version? The costs vary from ca. $46 for the Battery Tender versus about 70 for the BMW.

  10. #10
    Registered User kgadley01's Avatar
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    Quote Originally Posted by LCBIKEMAN View Post
    I have found the correct tender to use with my battery...thanks for your comments... anyone use a "Battery - Tender" brand versus the BMW version? The costs vary from ca. $46 for the Battery Tender versus about 70 for the BMW.
    I think they both would do a fine job. just be sure that the one you get will turn its self off, when the battery is charged. that way all of you that live in the Great White North can leave it pluged up all winter.

  11. #11
    Why not? adooley's Avatar
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    I currently used the "Battery Tender" brand from, I believe, Deltran. I have the two bank version since I have a dual battery R1150RTP. It has worked flawlessly and supports the AGM battery, as well as, the standard flooded battery.
    Go with a smile!
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  12. #12
    Registered User LCBIKEMAN's Avatar
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    thanks, folks

    appreciate all the replies. BT Plus works for gel batteries as well as the others. Amazon has it for under $45. thank you all.

  13. #13
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    Cool 3 way battery chargers/tenders

    I was just reading the best way to preserve a batterie's life is with this type of charger. Here is part of the explanation:
    Batteries like to be charged in a certain way, especially when they have been deeply discharged. This type of charging is called 3 step regulated charging. Please note that only special SMART CHARGERS using computer technology can perform 3 step charging techniques. You don't find these types of chargers in parts stores and Wal-Marts. The first step is bulk charging where up to 80% of the battery energy capacity is replaced by the charger at the maximum voltage and current amp rating of the charger. When the battery voltage reaches 14.4 volts this begins the absorption charge step. This is where the voltage is held at a constant 14.4 volts and the current (amps) declines until the battery is 98% charged. Next comes the Float Step. This is a regulated voltage of not more than 13.4 volts and usually less than 1 amp of current. This in time will bring the battery to 100% charged or close to it. The float charge will not boil or heat batteries but will maintain the batteries at 100% readiness and prevent cycling during long term inactivity. Some Gel Cell and AGM batteries may require special settings or chargers. ******Any comments?

  14. #14
    Once there was a Tavern PAULBACH's Avatar
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    Deltran FAQ page

    1. Questions: How can I tell if my battery is charged or not?
    2. How long will it take to charge a battery?
    3. How can I tell if my battery needs to be replaced?
    4. How is the Battery Tender Plus battery charger different from a trickle charger?
    5. How is the Battery Tender Jr. battery charger different from a trickle charger?
    6. What makes the Battery Tender Plus battery charger different from other automatic battery chargers?
    7. Is the Battery Tender Plus battery charger more expensive than a trickle charger?
    8. Is the Battery Tender Jr. battery charger more expensive than a trickle charger?
    9. How long can I leave the Battery Tender Plus battery charger connected to a battery?
    10. How can the Battery Tender Plus battery charger that is rated at 1.25 amperes recharge a battery as fast as another charger that is rated at 3 amperes?
    11. Can I leave the Battery Tender Plus battery charger connected to a battery while I’m using the battery to power another appliance like a radio?
    12. Is there any danger that the Battery Tender Plus battery charger can cause any damage to other automotive electronic systems while it is connected to the battery in my automobile?
    13. How is the Battery Tender Plus battery charger different from the Battery Tender battery charger?
    14. Can the Battery Tender Plus battery charger be used to charge more than 1 battery simultaneously if the batteries are connected in parallel?
    15. Can I charge more than one battery at a time with a single charger?
    16. Can I charge batteries with different voltages on a single charger, either a 12-volt or a 6-volt charger?
    17. What happens if the AC power is removed from the Battery Tender Plus battery charger while it is connected to a fully charged battery?
    18. What is Temperature Compensation and how important is it?
    19. Can the Battery Tender Plus successfully perform the initial charge on a new, flooded, motorcycle battery?
    20. What is the expected life of a H-D battery?


    For answers to all the above questions ... click here.

  15. #15
    Riding where it's hot! AZ-J's Avatar
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    I use a 2.5-year old Battery Tender Plus model on my R1200S, which I have fourteen months, and I still charge up the same battery. That may not sound like a big deal, but here where a garage can get to 140-160 degrees in the summer, a fourteen month old battery fails every time at months 12-14. Mine still tests well using a line tester that can test static and at load.
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