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AGM batteries

Discussion in 'Norton Commando Motorcycles (Classic)' started by ELLIS, Sep 10, 2019.

  1. ELLIS


    Jan 6, 2017
    Which agm battery should i buy for my mk3 Commando.

  2. Fanfan26


    Mar 14, 2012
    Last edited: Sep 11, 2019
  3. Craig

    Craig VIP MEMBER

    Dec 20, 2005
    Guess the one that matches specs in your book and that fits your tray , would suggest a brand you familiar with ....
  4. Danno


    Feb 7, 2010
    Have had good service from Bikemaster Gel Batteries. Their AGM didn't impress me as much.
  5. htown16


    Apr 29, 2009
    I've had good luck with Motobatt. Probably bought ten of them by this point. Get em off ebay with free shipping.
    ELLIS and NortonMKIIA850 like this.
  6. NortonMKIIA850


    Jul 20, 2017
    For a friend and neighbour, I've just re-awakened a Japanese bike that had stood totally neglected in a shed for four years: its Motobatt AGM battery was still good, it started the engine with no complaints, and without intervention from me.
    oldmikew, baz, Craig and 1 other person like this.
  7. gtiller

    gtiller VIP MEMBER

    Nov 5, 2012
    +1 for Motobatt

    Specifically for the standard MK3 with standard tray, it is the MBTX14AU that you need.



    The best price i could find in the UK is from Tayna:
    I have bought other stuff from them before, and they are as good as gold.

    You should note that these are a little taller than the size '12' that was originally in the bike.
    However, the extra cold cranking amps you are getting means it is a worthwhile squeeze.
    ...so much so, that even Andover will now recommend the size '14' for a MK3

    I recommend you stay away from lithium based technology unless you are going to spend time and money updating your charging system to accommodate it.
    I also recommend you stay away from gel based batteries - they are more expensive than AGM, for a technology that is not well suited to bikes like ours in my opinion.
    ELLIS likes this.
  8. Craig

    Craig VIP MEMBER

    Dec 20, 2005
    The lithium pocket charge/boost things are great to carry while not much bigger than a pack of smokes and they will boost a car or your bike several times on a single charge .... why bother putting one in your bike and spending on the other upgrades when you can just carry one in your pocket etc. for emergencies ....
    ELLIS likes this.
  9. zefer

    zefer VIP MEMBER

    Mar 18, 2013
    I like the shorai battery tons of CC amps a bit pricey but a great battery
  10. oldmikew


    Jul 25, 2015
    Had one on my ZZR for 12 years.. It has survived reg/rec failure and is often left for more than 6 months. Bike always starts..
  11. concours

    concours VIP MEMBER

    Dec 29, 2011
    The Chinese made Motobatt I used in my RZ350 quit after 3 years.
    I have one in the Tiger 1050, I’ll let you know how it lasts.
  12. alan hodge

    alan hodge

    Oct 10, 2017
    had mixed results with motobatt and scorpion agm motobatt I bought for 72 T120 lasted 2 years my friend keeps his 72 A65 here his motobatt 5 years old and still good...scorpions last between one year and have another one 6 years sold still ok...i have battery tender Jr and plug all my 6 bikes to it once a week til light turns green...…….bikes that only get ridden several hundred miles a year each as mine do a crap shoot batterywise.
  13. DogT


    Jan 20, 2009
    AGM were developed for use in helo's to stand the vibration. Gels are not so good that way. Go with an AGM. Get a smart charger and just keep it on the thing. It will last a long time.
    ELLIS and Craig like this.
  14. ELLIS


    Jan 6, 2017
    Thanks for all your posts, I have decided to go for the Motobatt battery so i will see how well that goes.


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