Small batteries

Discussion in 'Airheads' started by Sabre170, Mar 4, 2013.

  1. Sabre170

    Sabre170 Been here awhile

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    Anyone use any of these batteries?

    EVO2 8-cell

    Or

    Antigravity 8-cell

    I'm assuming that for my bike (100/7), a 4 cell would be too small, and a 12 would be overkill.

    Ultimately, weight isn't my concern, but size is. I want to get as small of a battery as possible.
    #1
  2. Houseoffubar

    Houseoffubar HoFmetalworks.com

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    I have not used either brand, but size wise, I think you are right on. A four cell will start your bike, but has very little in reserve. An eight should be perfect for just about anything, short of four wheels!:freaky
    #2
  3. Tankad

    Tankad Pure Shenanigans

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    #3
  4. Sabre170

    Sabre170 Been here awhile

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    Yeah,

    I've seen a lot of people say they use that odyssey battery too.....my only issue is size. That odyssey battery IS small (abound half the size of my normal battery), however, in my cafe ventures, I'd prefer an even smaller battery. I want to be able to hide it someplace out of view, and the size of that odyssey will limit my hiding places (I want to keep my center stand, so bottom of the bike behind oil pan mount isn't an option for me)
    #4
  5. Prmurat

    Prmurat Long timer

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    I have an EVO2 on my G/S since December.
    You have to find a way to fix it in the stock box: small bungee cords are your friends! Starting the bike always feels like hit and miss: the relay clicks a few time and you are thinking "damn the battery is weak!" but the bike starts every time!
    I am not sure I will do it again... But at that price I will keep a little longer!!
    #5
  6. Tankad

    Tankad Pure Shenanigans

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    not sure what your seat is going to look like, but you have a few options. maybe something like this: http://www.advrider.com/forums/showthread.php?t=850998&highlight=lithium

    or you can always try the Lithium Ion approach. there has been a lot of talk about those as well. I can't remember the post name, but one guy on here was running his bike of Lithium Ion about the size of a laptop battery.

    you might want to check out boxermetal.... he has a few options.
    #6
  7. Sabre170

    Sabre170 Been here awhile

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    Cool....thanks!

    Yeah, I've looked at boxer metal's, however, from what I can tell, he only sells a box that mounts in the bottom of the frame where the center stand goes. If I went this route, I'd loose my center stand, which I don't want to do.
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  8. Tankad

    Tankad Pure Shenanigans

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    are you going to get rid of the airbox? if so, he makes a part that relocates the battery in its place, right on the trans.
    #8
  9. Tankad

    Tankad Pure Shenanigans

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    here is a pic... (Taken from BoxerMetal.com)

    [​IMG]
    #9
  10. Sabre170

    Sabre170 Been here awhile

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    Prmurat,

    What model EVO2 did you use? (8 cell?)

    .....and as for air box mount......love the look, but not what I'm going for. I want a battery out of sight (or mostly out of sight).
    #10
  11. Prmurat

    Prmurat Long timer

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    I have the 12 cells EVO2
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  12. Tankad

    Tankad Pure Shenanigans

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  13. Sabre170

    Sabre170 Been here awhile

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    Yeah, I've considered hiding mine under the seat like that. My only hesitation, is that my cafe project had one requirement. The ability with not too much work to swap my solo seat back to the stock two person seat so my wife can ride with. If I hid the battery under the seat like that, I'd have to move the battery back to stock location when the 2 person seat is needed. Seeing that I will likely not ride with a passenger but 1 to 2 times a year, moving the battery wouldn't be too much of a pain if needed.

    I'm curious....why did Cafebeemer make that battery pan with the "Z" bend? Is there a reason he didn't/couldn't use a flat piece of metal and mount the battery on that???
    #13
  14. supershaft

    supershaft because I can

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    I refuse to take all that weight off the back of my bike and then add more with a battery. One step forward and two back.

    I use all my travel on a semi-regular basis. There are good reasons why the stock fender goes up into the subframe and seat. Mainly tire clearance. I see a lot of license plates, tail lights, battery mounts, seats, subframe cross members, and whatnot that are going to get into the tire big time when they hit a bump. Oh well, I never understood choppers either. In my mind, what works looks good.
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  15. Prutser

    Prutser Long timer

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    +1 on the weight and the wheel travel.
    Check how far the wheel can travel without the shocks. And than at least put some travel blockers under the bump stops to reduce the travel.
    IMHO its a shame to loose wheel travel...
    #15
  16. Tankad

    Tankad Pure Shenanigans

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    I've got the same problem with my cafe project. my plan is to take the stock battery holder and resize it or cut it down to fit the PC 680 exactly. than get rid of the plastic battery box side covers and sheet metal the sides in.... Like below:

    [​IMG]
    #16
  17. Warin

    Warin Retired

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    The reason you need a good (large sized) battery is due to the old design Bosch stater motor. There is a more efficent replacment (not the Valeo, the Denso) starter motor that will ease the battery requirement.

    Anyone with experience with the Denso stater motor and a smaller battery?
    #17
  18. Beemerboff

    Beemerboff Long timer

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    These cheap $100- Valeo knock offs work just fine - I have 100,000 km on mine and is is still perfect.

    The cheap Motobatt Oddessy copy works at least as well as the Oddessy too, 3 years / 100,000km and still perfect.

    The only test I have seen of the new technology batteries had the Antigravity a long way in front, but that was a few months back and things will probably be changing with the others pretty quickly - you cant keep selling batteries that explode under full load !
    #18
  19. _cy_

    _cy_ Long timer

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    really .. got any pictures of that exploded Antigravity battery?
    any other details .. what size battery, etc?

    Antigravity batteries with A123 26650 LiFePO4 cells are pretty rugged. it'd take some serious overcharging to pop A123 safety valves.

    now with lithium cobalt li-ion cells like on Boeing 787 ... by overcharging little as 1/2v over fully charged state... it's quite possible to get those type cells to go into thermal runaway and explode. vs lithium iron phosphate li-ion cells are very difficult to achieve any type of thermal event by massively overcharging.
    #19
  20. Beemerboff

    Beemerboff Long timer

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    The Antigravity was one that did not explode and came out in a long way in front on most tests.

    The others that did explode only did so during extremely severe testing, but it could happen.

    What I meant to say was that these things are still in the development stage, and are improving rapidly.
    If one explodes under test the manufacturer is surely going to find out why and fix it PDQ before he is sued out of business, so a six month old review probably isn't worth much.
    #20