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Sur Ron Battery 72V 50Ah – The Mega 72

4 reviews

Starting at 2490.00 

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Our Mega 72 Battery is for those that don’t accept compromise: you get insane power with close to limitless autonomy. Offering 17kW of power while packing 177% as much energy as the original battery.

Not only our 72V Mega 72 Battery will make you fly, it will also allow you to venture into uncharted territory thanks to its 3600Wh of capacity.

Shipping and returns

We ship worldwide (batteries are limited to Europe). Products indicated as being in stock are shipped in less than 72 hours after you place the order. Our warehouse is located in France, so transport cost and time may vary depending on the delivery country.

Changing one’s mind is human. That’s why you have up to 30 days after the delivery of your order for a return. Just let us know and we will take care of all the details.


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We offer different payment methods to accommodate your preferences: Credit Cards, PayPal, Wire Transfer & Klarna.

Your order is automatically validated as soon as the payment is confirmed. In case of a return, your refund goes to the payment method used for the order.

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Our insane Mega 72 – 72V 50Ah Battery – is capable of delivering 300% as much power as the original battery and packs 176% as much energy in a well-contained size. It will definitely lead you to the moon.

This high-end battery is hand-built in France to perfection. We are using A-grade, top of the line Samsung cells able to steadily deliver huge power output while keeping their capacity for years to come. Cyprien and I have been riding our 60 and 72V packs hard in enduro and in MX competitions. We rode them in the snow by -20°C and in the dust by +40°C so rest assured they’ll never let you down.

Our battery is built into a streamlined, robust stainless-steel case, providing best in-class protection against damages, featuring an integrated handle for easy manipulation and a built-in digital screen for hands-on readings.


Everyone wants to know how far their battery will lead them. It depends on many factors: the type of terrain you ride on, the elevation you’re aiming at climbing, rider’s wheight, etc.

Nevertheless, knowing what you usually do with the stock battery, you can double the range as our Mega 72 Battery brings improvements on two levels:

So if you used to ride 40km with your stock pack, you can safely assume you’ll now be riding around 80km. Will your arms resist that long? Although you’ll feel like the autonomy is never ending, the integrated LCD meter allows you to check the battery’s status in both percentages and volts.


The 72V Mega 72 pack was made with high-power controllers in mind (BAC 4000 & 8000, Nucular 24F, Sintech, TORP TC500…) and steadily delivers 17kW of power. Equally at ease on technical enduro singles, challenging tracks or in high speed situations, our 72V pack was made to provide power for as long as you need (or as long as your motor or arms can handle).

The 72V tension increases working efficiency, maintaining your controller and motor at optimal temperatures while allowing for higher motor RPMs. Top speed and torque will definitely depend on both the controller you use and your gearing. But if you ask me: “how fast can it go?” or “how much torque will it provide?”, there’s only one answer: yes.

In addition, our batteries all come equipped with a state of the art bluetooth BMS, enabling direct visualisation of battery temperatures or cells voltages on your phone.


The programmable BT BMS monitors all of the pack’s parameters: from cells voltages to core temperature, we have fine-tuned everything to get the most out of our architecture in a safely manner. The BMS is in charge of safety and will reduce or cut off current if required. For instance, it would damage the cells charging at freezing temperatures, so the BMS would prevent it until the temperature rises to a safe level.

The 60V vs 72V dilemma

We could debate for hours regarding what’s best between 60V and 72V. Long story short, the 60V battery will allow you to drastically increase the autonomy while retaining full compatibility with both the stock bike’s controller and charger.

On the other hand, although they require specific chargers and controllers, 72V packs allow to deliver even higher power while also boasting an amazing autonomy. A lower voltage battery will need to output more amps to reach the same power as one with a higher voltage. As amperage is what creates heat, at some point you reach the limit over which you’ll be overheating your motor and controller. That’s the very reason why 72V allows for higher power than 60V packs.

The same goes for 60V packs, sure we could optimise them more towards autonomy, but they wouldn’t be able to provide more than 5 or 6kW of power. Some manufacturers optimise their 60V batteries for capacity only while their 72V offering only aims at high power output with inferior energy-density. This is where the misunderstanding comes from.

That being said, all our batteries are top-notch in terms of power and capacity, so whatever your choice, it will rock you!

So, are you a 60V or 72V rider?

Technical details

Cells A-grade Samsung Li-Ion INR 21700 cells
Nominal Voltage 72V
Nominal Capacity 50Ah (3600Wh)
Power Output Up to 17kW
BMS 300A bluetooth BMS
Cell connections 0.3mm pure copper busbar
Casing Stainless-steel case with integrated handle and LCD
Cycle Life 500 cycles with 80% of nominal capacity
Weight 15kg
Height 37cm
Compatibility All 72V compatible controllers and chargers
Lid fitting In order to get the best capacity, this pack is slightly taller than the original one. It perfectly fits the original battery compartment with a minor (30 seconds) closing hook extension.

Rider’s questions

1 - 7 of 7 questions

Actually four questions, before I pull the trigger: 1. What kind of guaranty do you offer for the batt? 2. What BT BMS has to be used? iPhone compatible? Link to App Store? 3. What exact rating are the cells? 4. Are the gaps in the batt filled with some kind of gel to avoid damages due to vibration? 2 answers



Regarding cell rating I meant what type of cell? 50E? 40T? Other?

Quentin mto logo

Thanks for your interest! 1. We offer a 2-year warranty on all of our batteries 2. JBD BMS, best in class BT app on iOS and Android 3. A-grade, bench tested charge and discharge. 4. We use cell holders and fill the case with some vibration dampening foam to make sure it sits tight and the bikes vibrations won't alter its integrity.

Can we collect data on battery such as temperature, cell state etc. on the torp app (torp controller) ? 1 answer


Quentin mto logo

There's an app that allows to connect your phone to the BMS and see everything realtime. But the Torp cannot communicate with the battery over bluetooth.

The stock sur ron cables for the power and the controller are not suitable for the battery. Not sure how to connect. Any advise? 1 answer


Quentin mto logo

Not sure what you mean. The power cable is plug and play, now with aftermarket controllers you just don't need the data cable any more.

Hello, does this battery offer more range than the 80v 40mAh? Thank you 1 answer


Quentin mto logo

Hello Giacomo. They are about the same, both the Mega 72 and the Mega 80 have a 3,2kWh capacity. One has higher Ah but with a lesser voltage so in the end the Wh (what matters) is the same as they both have about the same number of cells inside.

How long does it take to fully charge this battery with the Ultra Charger? 1 answer


Quentin mto logo

With the Ultra Charger it can be done in just above an hour (from 0 to 100%) and about 50min if you're closer to 10% than 0.

User reviews

4.75 4 reviews

1 - 4 of 4 reviews





Great battery

Very clean looking, not too big so the bike still looks nice!

With the help of the torp tc1000 and tm25 motor im pushing 26.5kW with this battery

worth every penny!

I recommend this product





What a blast!

Fantastic piece of technology. Rock solid. The power increase is insane. We’re riding both batteries at 12KW which gives us double the range on trails compared to the stock battery. The stainless steel case looks excellent on the bike.

I recommend this product





The mega 72 battery needs some improvement

The outside shell of the battery has to sharp edges.





Just perfect

The quality and the type of construction is great! The product delivers what it promises!

I recommend this product