81V 50AH Race Battery for Sur Ron Light Bee

4.8/5 · 97 store reviews
£2,750.00 GBP
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Description

EVFREAKS Race 81V 50Ah Battery for Sur-Ron Light Bee

Built for extreme performance, the EVFREAKS 81V 50Ah Race Battery delivers up to 60kW peak and 25kW continuous output – giving you all the torque and acceleration needed for serious off-road riding and competition-level racing. With a 550A peak discharge, this battery is engineered for riders who demand maximum power and responsiveness from their setup.

Every unit is hand-built in Germany using Grade AA+ 21700 cells, copper-welded (no nickel), and assembled with premium materials to ensure safe, reliable, and consistent power delivery under the most demanding conditions. Housed in a 1.5mm stainless steel IP65-rated case, and equipped with an active 650A BMS, AWG6 silicone cabling, and QS8 anti-spark connectors, this pack is designed for riders who don’t compromise.

Custom made to order – 2 to 3 weeks production time.

Technical Specifications:

 

Specification Detail
Voltage 81V
Capacity 50Ah (3855 Wh)
Peak Power 40–60kW discharge
Weight 18 kg
Protection Rating IP65
Enclosure 1.5mm stainless steel
Battery Management System 650A rated
Bluetooth Interface App (Android & iOS)
Warranty Coverage 1 year
Shipping Availability UK & EU stock


Included with Purchase:

  • Discharge phase cable replacement harness (6AWG with QS8 connector)

  • 125A high-current upgraded breaker

  • Lid extension hardware (required if not using EVF seat extenders – battery is 25mm taller than stock)

  • Air wedge to prevent battery movement

  • Full remote support from an EVFREAKS engineer for installation & programming

PLEASE NOTE:

  • For off-road/race use only – not road legal

  • Charger not included – optional adjustable chargers (0–15A / 0–40A) available

  • DIY installations are at your own risk

  • Always charge in a dry, ventilated, and supervised location

  • Professional installation is strongly recommended

Why EVFREAKS?

At EVFREAKS, we don’t rely on mass-produced components or Chinese imports. Every battery is hand-built in Germany using only AA+ grade cells and premium materials to ensure unmatched performance, safety, and longevity. Since 2021, our builds have proven themselves in racing conditions – where consistency and reliability matter most. We're not just selling batteries; we're engineering purpose-built power systems that outperform anything else on the market. No compromises.

    Shipping & delivery

    We usually dispatch orders within 1 to 3 working days after purchase. If an item is on pre order, this will be clearly stated on the product page before checkout, along with the lead time. For example, our 72V and 81V batteries are custom made and take 2 to 3 weeks to build. All other items such as service parts, CNC parts, and controllers are in stock.

    We currently ship to the United Kingdom, the United States, Canada, Australia, and Europe, also including regions such as Norway, Sweden and Switzerland.

    Returns & refunds

    If you need to return an item, we make it straightforward.

    1. Contact us first with your order number and the item you want to return. If the item is faulty or damaged, send a couple of clear photos so we can help faster.
    2. We will confirm eligibility based on our Returns and Refunds Policy and send you the return instructions.
    3. Pack the item securely in its original condition with all accessories, packaging, and paperwork.
    4. Send it back using a tracked service and keep your proof of postage.

    Once it arrives, we will check it and move things along quickly.

    Let customers speak for us

    from 96 reviews
    Good quality

    Much better than my x9000 . Throttle is so smooth and wheelie mode is insane. Thanks guys!

    Anonymous
    Moxin 60kW Wheelie Controller for Sur-Ron Light Bee Plug & Play Kit
    Top fellas

    One of the best purchases I have ever made and one of the best customer services I have received. Well happy! Purchased it last month. Installation was simple, and after guys from evfreaks helped me to get it all programmed through the face time

    John Smith
    Moxin 60kW Wheelie Controller for Sur-Ron Light Bee Plug & Play Kit
    Light bee upgrade

    The lads down at evf looked after me got a nice bac4 k with a bypass loads of cnc aftermarket parts haad me bike back within days no messin about bike was keeping up with 72v 65 mph in seconds alta throttle response was sick bee throwing the ultra stop slacking an get ye bikes booked in

    Josh D
    Moxin 60kW Wheelie Controller for Sur-Ron Ultra Bee Plug & Play Kit
    Belter kit

    What else I can say - well happy with the kit. I got it for my sons birthday, shipping was quick and installation was easy enough. Once installed we got it programmed one of evf engineers remotely in less than 30mins!

    T.L.
    ASI BAC4000 Power Upgrade Controller Kit for Sur Ron Light Bee
    Excellent product

    Excellent product But have not received my chain conversion

    Niel Gregory
    Seat Riser Kit for Sur Ron Light Bee

    Great fit great look great service

    Cole Kitzman
    Bundle Reinforced Linkage and Seat Extenders
    i didnt get it yet but looks exceptional

    very good stuff

    Anonymous
    Custom Main Wiring Loom for Sur Ron Light Bee
    Torp tc1000

    I ordered the tc500 then got a message from evfreaks that it was out of stock and would I like to upgrade to tc1000 with a discount for the mistake so I did an it is wicked , so thanks ev freaks very happy with my purchase

    Marley
    TORP TC1000 Controller for Sur Ron Light Bee

    A nice bit of kit

    Elliott Reeves
    Full Lock Set for Sur Ron Light Bee
    Thxs for everything

    Top products, quick delivery and responds!! Very helpfull for everything...best shop for surronaddicts!! again and again

    Christoph Dalla Bona
    Heavy Duty Motor Guard Bashplate for Sur Ron Light Bee
    Bac4000/bac8000

    Worth every penny quick response and Amazing service 5 stars

    Brandon
    Remote Programming Service for ASI BAC8000 / BAC4000 Controllers

    EVF Lift Kit Seat Extenders / SUR-RON Light Bee

    Nicola Burrows
    Seat Riser Kit for Sur Ron Light Bee
    Review

    Worth the money a lot smother and more power delivery took 10 days to come

    Daley Graham
    TORP TC1000 Controller for Sur Ron Ultra Bee
    good

    good

    Clint jonson
    Electric Bike Sur Ron Light Bee LBX Purple Edition
    Everything OK

    Excelent communication.

    Bedrich Bednar
    Wiring Loom for ASI BAC Controllers for Sur Ron Light Bee

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