72v 55ah dominator v4
72v 55ah dominator v4
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Sur Ron 72V 55Ah Dominator V4 Battery (3960Wh, 32kW) + Charger
Extreme Power Meets Extended Range
Built with premium Samsung 50S 21700 cells and a rugged 316 stainless steel exoskeleton, the Dominator V4 is our high-capacity, high-performance battery designed for serious riders who demand extreme output and superior longevity.
Controller Compatibility: ASI, EBMX, VTB, Torp, KO & Nucular Controllers
⚠️ Not compatible with the original stock Sur Ron controller
Key Features
- Voltage / Capacity: 72V / 55Ah (3960Wh)
- Peak Output: 32kW (400A peak, 550A BMS-rated)
- Continuous Output: 16kW @ 250A for over 4 minutes
- Range: 264% greater than OEM (lab tested: 181.5 km @ 25 km/h avg speed)
- Weight: 19.2kg
- Height: 373mm (with lid spacer – included)
- Free Upgraded High-Power Loom Included
- 8A Charger Included
Battery Performance
- Standard Output: 19.2kW @ 250A
- Peak Output: 32kW burst (up to 51 seconds before MOSFET thermal cut-off)
- Voltage Drop: 6V drop at 250A continuous discharge
- Cell Lifespan: ≥ 70% capacity retention after 3 years (Samsung 50S cells)
Each of the 220 Samsung 50S cells has low internal resistance, allowing for exceptional discharge capacity while maintaining lower temperatures under load.
Durability & Build Quality
- Case: Marine-grade 316 stainless steel (sealed and powder-coated inside/out)
- Connection Materials: Pure copper sheet (not nickel-plated)
- Internal Protection: Fiberboard, Kapton tape, cell-level heat shrink
- Bluetooth BMS: 400A peak / 250A continuous with full monitoring and balancing
- Cell Wrapping: Each cell individually wrapped for added protection
- Handle: Integrated cord handle for easy installation/removal
Connectors & Installation
- Main Discharge Connector: QS8 with heavy-duty 6 AWG cable
- Charge Port: XT60
- Lid Spacer & Hinges: Included for Sur Ron frame fitment
- Fitting: Direct replacement of OEM cable with our high-power loom
⚠️ Connection Order:
- Turn the red trip switch on the bike OFF
- Connect the original power cable
- Turn the red trip switch ON
- Connect the upgraded power leads
No special disconnection order is required for removal.
Charging Instructions
- First Charge: Always plug the charger into the wall outlet before connecting to the battery to prevent arcing
- First Charge Duration: 12 hours (balance charge)
- Safety: Always charge in a safe, supervised area
Battery Activation
⚠️ Activation required upon delivery
Please contact us to activate your battery once received. This also confirms delivery and starts your warranty coverage.
Samsung 50S Cell Specifications
| Brand: | Samsung |
| Model: | 50S |
| Size: | 21700 |
| Chemistry: | INR |
| Nominal Voltage: | 3.6V |
| Capacity: | 5000mAh |
| Max Discharge: | 30A (25A continuous) |
| Rechargeable: | Yes |
| Dimensions: | 21.1mm x 70.4mm |
Warranty
- 12-Month Warranty: Covers BMS and all non-cell components
- Cell Warranty: Covered under general warranty with guaranteed 70% capacity retention after 3 years
- UK Orders: Free return shipping for faults within first 6 months
- International Orders & After 6 Months: Return shipping is the customer’s responsibility
⚠️ This battery is not compatible with the standard OEM Sur Ron controller
🏍️ Bike not included.
We strive to provide fast and reliable shipping for all orders. All products are processed and shipped within 1-2 business days after order confirmation. Shipping times may vary depending on your location, but typically, you can expect your order to arrive within 3-7 business days for domestic shipments. We offer international shipping to select countries, and delivery times will vary based on location. You’ll receive a tracking number once your order has been shipped, so you can follow your package’s journey. Please note that any customs fees or import duties for international shipments are the responsibility of the customer. For more details or if you have any questions, feel free to contact our customer service team.
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Frequently Ask Questions
What types of electric bikes do you offer?
We offer a range of electric bikes, including city bikes, mountain bikes, and off-road bikes. All our bikes are designed for comfort, power, and efficiency, providing an eco-friendly and enjoyable riding experience.
How long does it take to charge an electric bike?
Our electric bike batteries typically take 4-6 hours to fully charge, depending on the battery size and charger used. We recommend charging your bike overnight for convenience.
What is the range of your electric bikes?
Our electric bikes have a range of 30-60 miles on a full charge, depending on the model, riding conditions, and level of assistance chosen during your ride.
Are your electric bikes suitable for off-road use?
Yes, many of our models are designed with off-road capabilities in mind. With strong suspension, durable frames, and powerful motors, they are perfect for mountain trails and rugged terrains.
Can I test ride an electric bike before buying?
Yes, we offer test rides at our store. Please contact us to schedule an appointment and experience the comfort and power of our electric bikes firsthand.