Replacement Battery

Type
Size
Add to Cart

Description

Add a bigger battery to increase range and ride time.

Standard

These batteries, also known as Reention Dorado batteries, fit into the downtube frame of your Biktrix eBike. Made with top-of-the-line Samsung and Panasonic cells, it doesn't get much better than this.

  • Juggernaut Classic
  • Juggernaut Ultra 1000 & 1000 Pro
  • Juggernaut Ultra FS
  • Stunner LT
  • Stunner X
  • Stunner Step-Thru
  • Stunner Step-Over
  • Swift Step-Over
  • Swift Step-Thru
  • Skycap

Hidden

These replacement batteries are enclosed within the frame of:

  • Juggernaut Ultra Beast (48V 15Ah)
  • Challenger (48V 14Ah)
  • Juggernaut Ultra FS Pro
  • Juggernaut Duos (52V 17Ah)
  • Swift Lite (36V 10Ah)

Range Extender

These Range Extender replacement batteries are compatible with the following eBikes:

  • Juggernaut Ultra Eagle (52V 21Ah only fits the large frame Eagle)
  • Juggernaut Duos** (additional battery)

 

**The following are NOT compatible with the 21Ah downtube batteries (if you are unsure of the fit, please email us):

  • 18.5" Ultra Duo 2 Step-Over
  • Classic Duo Step-Over
  • Ultra Duo 3 Step-Over

Charger included in each battery purchase.

Customer Reviews

Based on 45 reviews
82%
(37)
2%
(1)
4%
(2)
7%
(3)
4%
(2)
S
Shaun McMahon
To Big

The battery is too big for my Juggernaut Classic. Should have ordered the smaller less powered battery. I thought it would fit my bike but the website was unclear. Showed 3 batteries for the Classic duo but the 52v 17.5ah does not fit. Hopefully Boktrix will make it right.

O
Oliver Jacob
works as expected

nice upgrade, I have almost twice the range now

J
Jeff Millar
Battery to be tried

Excellent customer service in replacing my battery with an upgraded amp-hour battery. Waiting for the bike’s electronics to be repaired as that was what shorted out the battery in the first place. Will report when all is back in working order.

M
Mathieu Perreault
Battery replacement has diffrent charger

Battery replacement has a 3 prong charger vs my old 1 prong charger... now I have to lug around 2 chargers.

R
Randy Morris
Battery

The battery does have more power. Going from a 48v to a 52v. Wa looking for a higher amp hour battery but doesn't look like they will be making one. Was looking for longer range but haven't given the new battery a long ride but seems that it should go farther than the 48v as don't have to go above pas 1 so not using much battery. This is on a FX pro.

c
cory cory
Possible battery upgrade

Wish there was option to get longer lasting batteries for the beast from 48v 15ah to 52v21ah. That would be tits an deserve a 5 but since there is only that hard option of 1 kind though high distance I give a 3*. An the battery housing could use a better fender to gaurd it from rooster tail debris.

D
David Macrae
Received / Charged / Ready to Go

Now that I have 2 Batteries - Looking forward to keeping up to the distances my wife can achieve with her Duo.

W
Walter Payne
I did not order a replacement battery:)

I bought a the beast and love it!
I need to get the level one assist to stop when I stop peddling as it will keep on pushing for the equivalent of three power strokes. A programming item should easily rectify.

I actually ordered an Armageddon l ight two weeks ago at the Kits store.

M
Mike Archuleta

My card was charged October 6 I didn’t receive my battery till October 26. I specifically told the representative I needed battery before the 22nd.If you are ordering from bitrex allow 3 weeks to receive your order.

Customer Reviews

Based on 45 reviews
82%
(37)
2%
(1)
4%
(2)
7%
(3)
4%
(2)
S
Shaun McMahon
To Big

The battery is too big for my Juggernaut Classic. Should have ordered the smaller less powered battery. I thought it would fit my bike but the website was unclear. Showed 3 batteries for the Classic duo but the 52v 17.5ah does not fit. Hopefully Boktrix will make it right.

O
Oliver Jacob
works as expected

nice upgrade, I have almost twice the range now

J
Jeff Millar
Battery to be tried

Excellent customer service in replacing my battery with an upgraded amp-hour battery. Waiting for the bike’s electronics to be repaired as that was what shorted out the battery in the first place. Will report when all is back in working order.

M
Mathieu Perreault
Battery replacement has diffrent charger

Battery replacement has a 3 prong charger vs my old 1 prong charger... now I have to lug around 2 chargers.

R
Randy Morris
Battery

The battery does have more power. Going from a 48v to a 52v. Wa looking for a higher amp hour battery but doesn't look like they will be making one. Was looking for longer range but haven't given the new battery a long ride but seems that it should go farther than the 48v as don't have to go above pas 1 so not using much battery. This is on a FX pro.

c
cory cory
Possible battery upgrade

Wish there was option to get longer lasting batteries for the beast from 48v 15ah to 52v21ah. That would be tits an deserve a 5 but since there is only that hard option of 1 kind though high distance I give a 3*. An the battery housing could use a better fender to gaurd it from rooster tail debris.

D
David Macrae
Received / Charged / Ready to Go

Now that I have 2 Batteries - Looking forward to keeping up to the distances my wife can achieve with her Duo.

W
Walter Payne
I did not order a replacement battery:)

I bought a the beast and love it!
I need to get the level one assist to stop when I stop peddling as it will keep on pushing for the equivalent of three power strokes. A programming item should easily rectify.

I actually ordered an Armageddon l ight two weeks ago at the Kits store.

M
Mike Archuleta

My card was charged October 6 I didn’t receive my battery till October 26. I specifically told the representative I needed battery before the 22nd.If you are ordering from bitrex allow 3 weeks to receive your order.