In the competitive e-bike market, providing solutions to enhance riding range is crucial for businesses looking to meet customers’ needs. Range extender batteries have emerged as a practical and efficient way to boost e-bike range, catering to both consumer demand and industry innovation. This article highlights the top 5 e-bike range extender batteries designed for manufacturers, distributors, and fleet operators. We’ll compare their voltage, capacity, size, and IP rating to help you identify the right options for your product lineup or business offerings. Whether you aim to expand your portfolio or meet specific end-user requirements, this guide is tailored to support your decision-making process.
Bosch PowerMore 250
Voltage: 36V
Capacity: 6.7Ah, 241.2Wh
Weight: 1.5kg
Size: 200*88*75 mm
Energy density: 160.8Wh/kg
IP rating: IP55
Overview: The Bosch PowerMore 250 is compact and lightweight, offering the highest energy density of 160.8Wh/kg and the largest capacity of 241.2Wh. However, it only supports a 36V option, has an IP55 rating, and works exclusively with the Bosch system.
Tritek TP6080 & TP6125
Voltage: 36V / 48V
Capacity: 4.9Ah, 176.4Wh / 4.9Ah, 235.2Wh
Weight: 1.25kg / 1.6kg
Size: D78.5*210mm
Energy density: 141.12Wh/kg / 147Wh/kg
IP rating: IP67
Overview: The Tritek TP6080 and TP6125 provide both 36V and 48V options with capacities up to 235.2Wh. Their IP67 rating ensures durability in challenging environments. Although their energy density (up to 147Wh/kg) is slightly lower than Bosch, and they are 10mm longer, these batteries offer broad compatibility with most systems and can also serve as a single battery or charger, making them versatile solutions.
Mahle Range Extender SP1
Voltage: 36V
Capacity: 5.8Ah, 208.8Wh
Weight: 1.6kg
Energy density: 130.5Wh/kg
IP rating: IP57
Overview: The Mahle Range Extender SP1 has the lowest energy density among the top 5 range extender batteries at 130.5Wh/kg. Its IP57 rating is better than Bosch’s IP55 but falls short of Tritek’s IP67. It only offers a 36V option and is exclusively compatible with the Mahle system.
Mahle Range Extender eX1
Voltage: 36V
Capacity: 4.75Ah, 171Wh
Weight: 1.1kg
Energy density: 155.45Wh/kg
IP rating: IP57
Overview: The Mahle Range Extender eX1 is the lightest in the top 5 at just 1.1kg. Its energy density of 155.45Wh/kg is slightly lower than Bosch, and its IP57 rating is better than Bosch’s IP55 but less durable than Tritek’s IP67. Like the SP1, it only supports a 36V option and is limited to the Mahle system.
Specialized SL Range-Extender
Voltage: 36V
Capacity: 4.44Ah, 160Wh
Weight: 1.1kg
Energy density: 149.45Wh/kg
Size: D74*203mm
Overview: The Specialized SL Range Extender is also the lightest among the top 5, matching the Mahle eX1 at just 1.1kg. With its capacity of 160Wh, it might be eligible for carry-on or checked luggage on airplanes, but this requires confirmation from the airline. Like other options, it only offers a 36V configuration.
For clear comparison, we have prepare table here:
| Item | Photo | Nominal battery voltage | Power | Weight | Energy density | Size | IP rating |
| Bosch PowerMore 250 |  | 36V | 241.2Wh | 1.5kg | 160.8Wh/kg | 200*88*75 mm | / |
| Tritek TP6080 |  | 36V | 176.4Wh | 1.25kg | 141.12Wh/kg | D78.5*210mm | IP67 |
| Tritek TP6125 |  | 48V | 235.2Wh | 1.6kg | 147Wh/kg | D78.5*210mm | IP67 |
| Mahle Range Extender SP1 |  | 36V | 208.8Wh | 1.6kg | 130.5Wh/kg | / | IP57 |
| Mahle Range Extender eX1 |  | 36V | 171Wh | 1.1kg | 155.45Wh/kg | / | IP57 |
| Specialized SL Range-Extender |  | 36V | 160Wh | 1.1kg | 149.45Wh/kg | D74*203mm | / |
Conclusion: Choose the Tritek TP6080 & TP6125 for Versatility and Performance
When selecting an electric bike range extender battery, it’s essential to consider factors like capacity, voltage options, energy density, and compatibility with various systems. While each of the top 5 range extenders has unique strengths, the Tritek TP6080 & TP6125 stand out for their dual voltage options (36V/48V), impressive IP67 rating, and broad system compatibility, making them adaptable to a wide range of e-bike setups.
Unlike many competitors limited to specific systems, Tritek batteries provide unmatched versatility by functioning as both a range extender and a single battery or charger. Their combination of performance and adaptability makes them a reliable choice for manufacturers, distributors, and fleet operators looking to expand their offerings.
Ready to enhance your e-bike range solutions?
Discover how Tritek’s TP6080 & TP6125 range extenders can fit seamlessly into your product lineup. Contact us today to learn more about customization options and take your business to the next level!
Can the Tritek TP6080 & TP6125 Range Extenders Be Mounted on a Bicycle Frame or Bottle Cage?
Yes, the Tritek TP6080 & TP6125 range extenders are designed to be compatible with standard bicycle frames and bottle cage mounts. Their compact size and cylindrical shape allow for easy installation in most e-bike setups, providing a seamless and secure fit. This flexibility ensures that riders can conveniently attach the range extenders without the need for specialized mounting systems, making them an excellent choice for a wide variety of e-bike models.
You can check the below video shows how to mount the Tritek range extender!
