Sur-Ron & Talaria Batteries: The ULTIMATE Guide with Antonin from Ampérion (Everything You Need to Know Before Upgrading!)

Hello to all electric ride enthusiasts! At JW Shop, we know that the battery is the heart of your Sur-Ron or Talaria, especially when it comes to upgrades. We receive a lot of questions about voltages, capacities, cells, charging... and that's normal, the subject can seem complex! That's why we decided to go all out with a super comprehensive video with Antonin from Ampérion, a true expert and French manufacturer of custom batteries. Get ready, it's a masterclass!

Meeting Antonin from Ampérion: "Made in France" Expertise

Before diving into the thick of it, let's get to know our guest. Antonin is not unknown to some of you who encounter him in groups. His journey, from electric skateboarding inspired by Casey Neistat to professional drones, naturally led him to manufacturing high-performance batteries. A passion born from the need for more power and autonomy, which has transformed into real expertise, especially with the arrival of Sur-Ron and the specific design challenges they represent.

For Antonin, manufacturing a battery is a constant balance between innovation (research into exotic materials, connection optimization) and production constraints. An exciting industrial challenge!

Decoding a Battery: From Cell to Assembly

But concretely, what are we talking about? Antonin enlightens us on the fundamentals:

• The Cell: The basic component (anode, cathode, separator...). We explore the different formats (18650, 21700, pouch cells) and why the 21700 format is preferred for our machines (durability, supply, adapted dimensions).
• Series (S) and Parallel (P) Assembly: The famous "22S 10P" nomenclature will hold no more secrets for you! Understand how voltage (Volts) and capacity (Ampere-hours) are added.
• Energy (Wh) vs. Capacity (Ah): The classic mistake is to only look at Ah. Antonin explains why you should always consider the voltage. An 80V 50Ah (4000Wh) battery will have more energy than a 60V 60Ah (3600Wh) battery!

These basics are crucial for understanding what follows and for making informed comparisons, even with machines like the KTM Freeride E-XC or the Stark Varg and their very different voltages.

The Power Chain and Key Settings

An electric motorcycle is an ecosystem. Antonin details the power chain: Battery → Controller → Motor.

• The Controller: The brain that drives electricity to the motor. We discuss essential settings such as "Motor Current" (instantaneous torque) and "Battery Current" (range, power). The important thing is to adjust these values according to the maximum capacities of your equipment (battery AND motor) to avoid overheating.
• What's holding it back? If you lack torque at startup, it's often the motor. If you lack "oomph" at high speed, it's the battery. According to Antonin, the priority upgrade? Controller, then battery, and finally motor if needed.
• Field Weakening: This function allows to increase the top speed of the motor by modifying its internal characteristics, but often at the expense of overall efficiency.

Antonin emphasizes the importance of modern semiconductors and open-source projects (like VESC, on which the Torp controller is based) which have enabled incredible technological advancements in terms of feel and riding precision.

Choosing and Maintaining Your Custom Battery: Expert Advice

Let's get down to business: how to choose and take care of your precious battery?

• Cell Selection: Samsung 50G (good performance/price ratio), Samsung 50S (for large controllers/motors), Molicel P45B (for extreme uses)... The choice depends on your use, your weight, and your budget. Be careful, cell "datasheets" are not always standardized between manufacturers!
• Connectors: For charging, Ampérion uses XT60, robust and proven, allowing fast charging (up to 1C, i.e., the battery's capacity in amperes). For discharge, QS8 is often sufficient for most users, with QS10 reserved for the most extreme setups.
• Temperature: THE Key Factor. Whether charging or discharging, excessive temperature degrades the battery. Occasional heating is not dramatic, but constantly keeping the battery hot should be avoided. The BMS (Battery Management System) is there to cut off in case of overheating (around 65°C when charging at Ampérion).
• Fast Charging: Myths and Realities. For Antonin, fast charging starts at 1C (e.g., 50A for a 50Ah battery). Common 10-15A chargers are actually slow chargers. Adjustable "Super Chargers" (often repurposed server power supplies) allow adjustment of the charging current and are more respectful of the grid.
• Storage and Lifespan: No break-in period for a lithium-ion battery! It's at its best from the start. Most importantly: avoid leaving it at extreme charge states (0-20% or 80-100%) for long periods. The ideal is to store it around 50-60%. Recharge it shortly before your ride rather than leaving it full for a week.
• The Displayed 0%: Don't panic! When your screen shows 0%, there is actually a margin (about 15%) remaining to protect the battery. So you can go until it cuts off without damaging it, but remember to recharge it quickly afterwards (at least to 50% if you're not riding right away).
• Voltage Sag: This voltage drop you observe during acceleration is normal. It's due to the internal resistance of the cells, cables, connections... Your voltage (and therefore percentage) reading is most reliable when stopped, with no current being drawn.

Internal Design and Costs: Manufacturing Secrets

Antonin also opened the doors to internal design for us: importance of connection cross-section (equivalent to 10mm² of copper), charge balancing on each cell to avoid premature aging, dielectric and mechanical insulation to resist shocks and vibrations. He explains his choice not to use "holders" (individual plastic cell supports) to optimize space and thermal management, preferring a coherent thermal block without trapped air.

The role of the BMS is crucial: it's an intelligent switch that monitors balancing, temperature, and cuts off current if conditions are not met.

And the fateful question: why is a custom battery expensive? Beyond the cost of the cells (800-900€ excl. tax for a 72V 50Ah 50S), there's skilled labor, amortization of manufacturing equipment, R&D, insurance, after-sales service (2-year warranty and support beyond that at Ampérion), and the necessary margin to sustain and evolve the structure. A price justified by quality, reliability, and service.

The Future of Batteries and Electric Propulsion

Finally, what evolutions can we expect? Antonin believes we will see higher capacity cells (approaching 6Ah per 21700) combined with high power, allowing for example 72V 60-65Ah batteries in the same format and weight. Pure power may have reached a usable plateau on our machines; the focus will be on more autonomy and less "sag". No immediate chemical revolution for our high-performance uses (we will stay with Li-ion), but incremental improvements. Revolutions could rather come from motor designs (axial flux, hairpin, better cooling) and controllers (more features, larger and more accessible powers).

We hope this comprehensive guide has enlightened you! A huge thank you to Antonin for his time and fascinating explanations. Feel free to ask your questions in the comments of the video or this article.

To find Ampérion batteries manufactured by Antonin, click here: Ampérion Batteries on JW Shop.

And for the famous adjustable Super Charger mentioned in the video: JW Shop Super Charger.