A2B Kuo, Kuo+, Fast4ward Smart Battery

Posted on July 10 2018

A2B Kuo Plus Fast4ward Smart Battery

Do you have an A2B Kuo, Kuo+, Fast4ward or other model that uses this e-bike smart battery? We can service and rebuild it for you if it's not giving you the range it originally did. These batteries pack in 28 cells in a 7S 4P configuration allowing us to upgrade it up to 24V 12Ah, giving you 30% more range than the original!

A2B Kuo Plus Fast4ward Smart Battery

Just fill out our Battery Intake Form and send us your battery and charger. We'll contact you when we receive it and have your wheel running again soon!


  • EBike Marketplace: July 09, 2020

    @Jules – Yes, our rebuild service should fix this. We’ll be in touch with our recommendations!

  • Jules: July 09, 2020

    I just bought this bike used and the battery seems to be working fine. However, the owner had it in storage for about 3-4 years. It’s giving me about 25 miles per charge, but the manual says if there is going to be long term storage and the BMS is turned on it can permanently damage the battery. Should I be concerned? What is this permanent damage? Is it something this service/rebuild could fix?

  • EBike Marketplace: May 14, 2020

    @Robert – We prefer to re-use the existing BMS if we can.

  • Robert Cowley: May 14, 2020

    Hi, I have a fast4ward folding bike with a failed battery. When you rebuild do you use the existing BMS or replace with modern. If you replace, do you retain all the bike functions? I was thinking about the 2 supplementary connections from the BMS to the bike via the 4 connections on the battery holder.(don’t know their function)

    Thanks Robert

  • EBike Marketplace: May 04, 2020

    @Larus – We only rebuild batteries that are sent in to us. We do not stock new ones.


  • EBike Marketplace: May 04, 2020

    @William – We’d be happy to rebuild and upgrade your battery for you:


  • Larus: May 04, 2020

    Hi Do you have this battery
    e-bike smart battery li-ion 24v 9000mah/216wh

  • William Fink: May 04, 2020

    I have a E-bike Smart Battery (Li-ion 24v 9000mAh/216Wh) that will not take a charge. What is the cost of a new one or rebuilding the one that I have?

  • EBike Marketplace: April 08, 2020

    @Michele – We’d be happy to rebuild and upgrade your battery for you:


  • MICHELE CHURCHILL: April 08, 2020

    What is the price for a rebuild?

  • EBike Marketplace: September 05, 2019

    @Steven – Our current pricing can be found here:


  • Steven Berkoff: September 05, 2019

    I have a Kuo A2B that uses the exact same battery as shown in your photograph. What is the fee to rebuild it?

    Thank you.

  • EBike Marketplace: August 30, 2019

    @Ido – We do not recommend changing the voltage of your battery. We do not stock new A2B batteries.

  • Ido Barnoy: August 30, 2019

    A couple of years ago I purchased a a2b kuo 24v/12a e-bike. I’m looking into replacing the battery, I was wondering whether the 36v battery will work with my current bike? if yes, do you have one? how much it will cost? and can you ship it to Israel?


  • EBike Marketplace: July 08, 2019

    @Larus – We can rebuild your existing batteries if you send them in to us, but we do not stock this battery.

  • Larus Halldorsson: July 08, 2019
    Hi, I have 3pcs A2B Edge wheels that have a useless battery 24V 9000mAh/216Wh do you have that battery?
  • EBike Marketplace: June 28, 2019

    @Gerardo – We only rebuild existing batteries so you need to send yours to us first.

  • GERARDO LOPEZ: June 27, 2019

    Hola buenas tardes,
    Necesito esta bateria, donde la puedo conseguir
    Soy de Alicante.
    e-bike battery li-ion 24v 9000mah/216wh

  • EBike Marketplace: May 14, 2019

    @John – We usually upgrade these to 24V 12Ah. Our current pricing can be found here: https://ebikemarketplace.com/products/a2b-li-ion-electric-bike-batteries?variant=39450299589

  • john: May 14, 2019

    How much would it cost for a rebuild for a li-ion 24v 9000mAh/216Wh
    it has been left for a long time it show its charged but not powering the bike
    cheers john

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