Range Extender Kit for Duo Series

Sale price CA$749.00 Regular priceCA$899.00Save CA$150
Sale price CA$749.00 Regular priceCA$899.00
Shipping: Leaves within 6-7 business days


This sleek external battery is a secondary battery on the Juggernaut Duo series bikes along with the Juggernaut FS Pro 2/3. Use this battery if you want to ride even further than you can with just the internal hidden battery! A high-quality design and many power options provide reliable power and range to extend your ride!

Which Connector type to get?

Range Extender Connector

Note: This battery has 3 different case heights - the larger 17Ah and 21Ah models may not fit smaller Step-Over frame sizes. Consult the pictures here for battery height and notes below for frame size compatibility.

Compatibility Notes:

(1) 52V16Ah / 52V17Ah Batteries incompatible with 17" Medium Frame
(2) 52V19Ah / 52V21Ah Batteries incompatible with 17" Medium Frame
(3) 52V16Ah / 52V17Ah Batteries only compatible with 20" XL Frame
(4) 52V19Ah / 52V21Ah Batteries only compatible with Large Size Frame


    Note: If you have a Juggernaut Duo Series bike you will need a Range Extender plate to connect your battery to the bike - consult this guide if you need help determining which type is on your bike! When buying your battery on this page the plate will be included!

    Wondering about the brand options and what to pick between Top Brand and OEM/Sinowatt? Take a look at this FAQ for some information!


    Bike Name 52V13Ah / 52V14Ah 52V16Ah / 52V17Ah 52V19Ah / 52V21Ah
    Juggernaut Hub Duo SO / ST
    Juggernaut Classic Duo Step-Over (1)
    Juggernaut HD Duo
    Juggernaut Classic Duo Step-Thru
    Juggernaut Ultra Duo 2 Step-Over (2)
    Juggernaut Ultra Duo 3/Pro Step-Over (3)
    Juggernaut Ultra Duo 3/Pro Step-Thru
    Juggernaut Ultra Duo 4 Step-Thru
    Juggernaut Ultra FS Pro 2 (4)
    Juggernaut Ultra FS Pro 3
    Juggernaut FS Step Thru
    Juggernaut Ultra Eagle (4)

    Need A Hand?

    Chat With Us
    We are always excited to hear from you. Just click the button below to activate chat now.
    Chat Now
    Book A Virtual Demo
    Our eBike specialists can help you find your dream eBike and answer any questions you may have.
    Book An Appointment Now
    Give Us A Ring
    24/7 e-mail support. 8/5 phone and live chat with eBike Specialists to help you in anyway.

    Customer Reviews

    Based on 14 reviews
    Kerry Wilhelm
    The best

    The best shipping , the best bikes .and biggest smiles

    Jim Shaw
    New Battery

    I ordered a new extended range battery from Biktrix as I’m planning for a few extended day trips this summer. Curtis quickly got my order in and I was surprised and pleased that it was on sale for $200 off the regular price. It was shipped and got here quickly with no issues. Thanks Curtis and Biktrix!

    Wayne Mulder


    Lucien Cortez

    WoW it’s great no more range anxiety

    George Parkson
    Nice addition

    The main battery gets good mileage, however I would suggest going with the extender. It fits nicely and can still use the step thru.