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In recent years, the electric bike industry has seen a rise in popularity, and with this surge comes the need for high-quality and reliable electric bike batteries. The Joubi 48V Rear Rack E-Bike Battery is a versatile and durable option for anyone looking to upgrade their electric bike. With a solid aluminium alloy case, easy installation, and a variety of discharge port cable options, this battery is designed to meet the needs of electric bike enthusiasts.

Design and Features

One of the most impressive features of the Joubi 48V Rear Rack E-Bike Battery is its waterproof and solid aluminium alloy case. This ensures that the battery is protected from the elements, making it suitable for use in all kinds of weather conditions. The sleek design and durable construction of the case make it a stylish and reliable choice for electric bike enthusiasts.

The battery also comes with a lighted LED power indicator, allowing riders to easily monitor the battery’s charge level. This is a convenient feature that helps prevent unexpected battery depletion during rides. Additionally, the taillight design provides an extra layer of safety, ensuring that riders are easily visible to other road users.

For added security, the Joubi 48V Rear Rack E-Bike Battery comes with a lock and keys that securely lock the mount to the bike rack. This prevents the battery from being easily tampered with or stolen, giving riders peace of mind when parking their electric bikes in public places.

One of the standout features of this battery is the inclusion of a bicycle rack, which makes it easy to install and remove. This eliminates the need for additional equipment and simplifies the overall process of integrating the battery with the electric bike.

Furthermore, the battery offers a variety of discharge port cable options, including USB for charging devices such as a phone. This adds an additional layer of functionality to the battery, extending its usefulness beyond just powering the electric bike.

Quality and Warranty

The Joubi 48V Rear Rack E-Bike Battery comes with a 24-month warranty, providing customers with peace of mind about the quality and longevity of the product. Additionally, all electric bike batteries from Joubi are equipped with high-quality cells and a battery management system (BMS) for optimal performance and safety. It is also noteworthy that every battery undergoes thorough testing before being shipped to the customer, ensuring that it meets the brand’s high standards.

With its consistent quality and reputation as a top lithium battery manufacturer, Joubi’s electric bike batteries are a reliable choice for consumers looking for long-lasting performance and peace of mind when investing in their electric bike.


The Joubi 48V Rear Rack E-Bike Battery is available in several nominal capacity options, including 10Ah, 12Ah, 15Ah, 18Ah, and 20Ah to cater to the diverse needs of electric bike riders. It utilizes a 2500mAh 18650 cell and boasts an impressive life cycle of up to 1000 cycles. The battery size is 380mm*160mm*85mm and features a standard charge current of 2A and a maximum continuous charge current of 3A. The charge cut-off voltage is 54.6V, and the charge temperature range is 0-45°C.

When it comes to discharge capabilities, the Joubi 48V Rear Rack E-Bike Battery offers a maximum continuous discharge current of 30A and a discharge temperature range of -20-60°C. It comes with a variety of discharge connector options, including T-plug, bullet, and XT60 as the default. The battery is suitable for use with 20-28-inch bikes, catering to a wide range of electric bike models.

The package includes the lithium battery, a battery charger, a rear rack suitable for 20-28-inch bicycles, a manual, and additional accessories. The comprehensive package ensures that users have everything they need to install and use the battery without the need for additional purchases.

Performance and Compatibility

The Joubi 48V Rear Rack E-Bike Battery is designed to be compatible with a wide range of electric bikes, making it a suitable choice for consumers with various models and motor specifications. With options ranging from 10Ah to 20Ah and a discharge current of up to 30A, this battery is capable of powering electric bikes with motors ranging from 200W to 1000W. This versatility ensures that riders can enjoy the benefits of high-performance battery power across different electric bike setups.

The addition of a rear rack for 20-28-inch bicycles further enhances the compatibility and ease of installation, making it a versatile option for a wide range of electric bike models.

Longevity and Safety

The Joubi 48V Rear Rack E-Bike Battery is built to last, with a robust aluminium shell that ensures durability and longevity. The battery is designed to withstand the rigors of regular use, transportation, and exposure to different weather conditions. Its modern shape and easy installation and removal make it a practical choice for electric bike owners looking for a hassle-free solution.

Safety is a top priority when it comes to electric bike batteries, and the Joubi 48V Rear Rack E-Bike Battery is equipped with a 30A BMS protective plate to prevent overcharging, over-discharging, overcurrent, and short circuits. This ensures that the battery operates safely and efficiently, providing peace of mind to riders and extending the overall life expectancy of the battery.

The battery’s charge cycle exceeds 1000 times, with a life expectancy of up to 5 years. This high durability and longevity make it a cost-effective choice for electric bike owners, providing reliable performance and peace of mind for years to come.


The Joubi 48V Rear Rack E-Bike Battery is a top choice for electric bike enthusiasts looking for a high-quality, reliable, and versatile battery solution. With its solid aluminium alloy case, ease of installation, comprehensive warranty, and high-quality cells and BMS, this battery offers exceptional performance and peace of mind to riders. Its compatibility with a wide range of electric bike models, as well as the added convenience of a rear rack and taillight design, make it a practical and effective solution for powering electric bikes. With its focus on safety, durability, and longevity, the Joubi 48V Rear Rack E-Bike Battery is a standout option in the electric bike battery market.

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