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Dorado Batteries for Juggernaut Classic, Stunner, Swift Series

Sale price£338.00 Regular price£422.00
Estimated to be shipped in 6-7 business days


This sleek removable battery is used in many different Biktrix eBike models ranging from Juggernauts to Stunners to Swifts. A high-quality design and many power options provide reliable power and range to extend your ride!

Note: There are two different case lengths for this battery. The batteries on this page have a 460mm Case Length (18.1"). If you are looking for the Short Case Battery please visit THIS PAGE.


  • Juggernaut Classic
    • May require reprogramming for 52V Battery
  • Juggernaut HD & Juggernaut HD Limited
  • Juggernaut Ultra 1000 & Juggernaut Ultra 1000 Pro
  • Juggernaut Ultra FS
  • Juggernaut XD
    • Only Compatible with 48V25Ah and 52V17Ah 1-Pin Batteries
  • Juggernaut Ultra Eagle 2
  • Stunner LT 
    • Some models may use the Short Case Battery
    • Only Compatible with 48V Batteries
  • Stunner Step-Over & Step-Thru
    • Some models may use the Short Case Battery
    • May require reprogramming for 52V Battery
  • Stunner X
    • May require reprogramming for 52V Battery
  • Swift Step-Thru
    • Only compatible with 48V Batteries
  • Swift Step-Over
    • Only compatible with 48V Batteries
  • Skycap
    • Only compatible with 48V Batteries

There are 48 and 52V versions of this battery available with different Ah capacities. Check out this guide for more information on battery Voltage and Ah!

Wondering about the Sinowatt battery option? Consult this FAQ for more information on these!

Technical Specifications

Dimensions (W x L x H)

48.7cm/19.2in x 64.1cm/25.2in x 18.5cm/7.3in



Included Hardware

Mounting Brackets


Bike Name 36V 48V 52V
Juggernaut Classic
Juggernaut HD / Limited
Juggernaut Ultra 1000 / Pro
Juggernaut Ultra FS
Juggernaut XD
Eagle 2
Stunner LT
Stunner Step-Thru/Over
Stunner X
Swift Step-Thru/Over

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Customer Reviews

Based on 6 reviews
Harley Porter
I did not expect extra speed!

I added the 20ah Dorado with Samsung cells to my MacGyvered dual battery setup. Wow, this battery packs a punch. My existing battery was 12.5ah, so this one kicks the power up to 32.5ah. What I did not expect was that my bike's performance would improve. I am getting 2-3 km/h gains in each of the 5 assist levels, and there is noticeable improvement in torque. Maybe this is a stealth 52v battery?

The Bixktrix sales staff was excellent in helping me with my purchase. The battery was shipped a few days after it was ordered, and it arrived by Purolator a day after it was shipped. I got a great deal due to a summer sale (less than half price). Shipping was $60, but this was partially offset by a $27 welcome coupon I found online. The battery was securely packed in a larger box, surrounded by high density packing foam.

The fan-equipped charger puts out 3 amps, and charged my battery fully in about 5 hours. Initially the light on the charger was flashing red and green. I was worried that something was wrong, but the Biktrix website reassured me that this was just the BMS balancing the cells. The flashing lasted for a few minutes then the battery charged normally. The charger got pretty warm, even with the internal fan, but I suppose that is to be expected with the higher amperage.

The 20ah battery is wider than a standard Dorado battery, and quite a bit heavier, but will fit on any bike that takes a standard Dorado battery.

So far I am extremely happy with this purchase. On my dual battery setup I have ridden 30 km and my display still shows 10/10 bars. I anticipate at least 150km range, and with the gain in speed, I am a happy camper.

Charles Bowman
Excellent Battery

Very reliable battery.

Andrew Ireland

Happy happy happy

Fernando Ricalday
Strong battery and fast delivery

Needed a new battery and it was delivered fast and speedy, the ports and covers are a significant upgrade from my previous battery. Needs a little more of a push when inserting. But looks sleek.

Robert Pedregon
the 48volt 17.5 ah battery

the second battery work's great on my classic bike it's the I got thru R&d Powersports in Palmerton Pa.

Lots of torque, hold on so you don’t fall back

I don’t know how long it will last, as they are Chinese battery