Custom Ebike Battery Supplier

KET is a one stop custom ebike battery supplier in China. We have over 13 years of experience in the development and manufacturing of lithium-ion batteries. Our lithium-ion battery products are widely used in ebike, energy storage system, forklift, golf cart, boat, etc.

What KET can do for you? All you have to do is provide the idea and KET will realise your new custom ebike battery. KET will not only customise your logo, but also the size, case, capacity, voltage, etc.

Why Choose Lithium-Ion Battery For Your Custom Ebike Battery

An e-bike battery, also known as an electric bike battery, is a rechargeable energy storage device specifically designed to power electric bicycles.

Late 19th century - The earliest electric bicycles used lead-acid batteries as an energy source.
1960s - NiCd batteries: NiCd batteries replaced lead-acid batteries, offering higher energy density and charging efficiency.
1990s - NiMH batteries: NiMH batteries replaced NiCd batteries with higher energy density, longer life, and less environmental impact.
2000s - Lithium-ion batteries: Lithium-ion batteries became the dominant battery technology for electric bicycles.

So Why Choose Lithium-ion Battery for Ebike? Here's a comparison of key parameters and features between these batteries:

Energy Density
Lithium-ion: About 150-250 Wh/kg
NiCd: About 40-60 Wh/kg
NiMH: About 60-120 Wh/kg
Lead-acid: About 30-50 Wh/kg

Cycle Life
Lithium-ion: Around 500-1000 cycles
NiCd: Around 500-1000 cycles
NiMH: Around 500-1000 cycles
Lead-acid: Around 200-300 cycles

Self-Discharge Rate
Lithium-ion: About 2-3% per month
NiCd: About 20% per month
NiMH: About 20-30% per month
Lead-acid: About 5-15% per month

Memory Effect
Lithium-ion: None
NiCd: Moderate to high
NiMH: Moderate to high
Lead-acid: None

Environmental Impact
Lithium-ion: Low environmental impact
NiCd: Contains toxic cadmium
NiMH: Lower environmental impact compared to NiCd
Lead-acid: Contains toxic lead and sulfuric acid

Weight
Lithium-ion: Lightest
NiCd: Moderately heavy
NiMH: Moderately heavy
Lead-acid: Heaviest

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Please note that these values are approximate and can vary based on specific battery models and ebike battery manufacturers. From the above comparison, it is easy to see that lithium-ion batteries are far ahead of other types of batteries in terms of overall performance. This is why lithium-ion batteries are now the preferred choice for most custom ebike batteries.

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Why Choose KET to Start Your Custom Ebike Battery Project

Extensive Product Range
Experience in customising many different types of ebike battery packs including water bottle battery, Polly battery, Frog battery, rear rack battery and more.

Extensive Project Experience
Over 300 ebike battery customized projects in the past 13 years

Certification and Safety
KET is certified according to the internationally recognised quality management system: ISO 9001
The products have been certified or safety reported: FCC, CE, RoHS, MSDS, UN38.3, etc.

Stable Supply Chain
KET has stable cooperation with a number of internationally renowned battery brands, so there is no problem of out-of-stock battery cells. Other accessories suppliers are concentrated around Shenzhen, making the supply chain very convenient and stable.

Strict Quality Control
Each custom ebike battery pack is subjected to incoming inspection, functional testing, protective panel testing, cosmetic testing, ageing testing, etc. before shipping.

Efficient Service
We have a very professional team of engineers who can guarantee you a professional custom ebike battery pack solution within 24 hours.

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The Ultimate Guide to Ebike Batteries

What is best battery for ebike?: The best battery for e-bike is lithium-ion battery. Because Lithium-ion batteries for e-bikes offer high energy density, long cycle life, low self-discharge, and high power output. Compared to other types of batteries, lithium-ion batteries give us a better e-bike riding experience.

How long do e-bike batteries last?: KET's lithium ion e-bike batteries have a cycle life of 500-1000 cycles and will last roughly 3-5 years. As most e-bike batteries on the market have now switched to lithium ion batteries, our answer applies to most people's ebike batteries. Of course the lifespan will vary greatly from one type of battery to another. And your battery maintenance habits will also affect the life of your battery. I won't go into detail here. For more questions you can ask our professional customer service.

Can I put a different battery on my e-bike?: In general, KET does not recommend replacing your ebike battery. Instead KET advise you to source the same ebike battery from the original ebike battery manufacturer.

Professionally speaking, however, you can put a different battery on your e-bike. But there are some factors to consider:

1. Is the new battery compatible with your e-bike's electrical system?
2. Will the new battery size fit into your e-bike's battery compartment?
3. If the new battery has a higher voltage or capacity, can the motor of your e-bike handle the increased power?

If you can confirm that you have solved all of these problems, then you can put a different battery on your e-bike.

How to charge ebike battery without charger?: Charging an e-bike battery without a charger can be a challenge, as chargers are specifically designed to provide the correct voltage and current to the battery. And the charging characteristics of different types of batteries are generally different. But in an emergency situation, you can try several of these methods for charging your e-bike battery.

1. Universal laptop charger: If you find that your laptop charger connector matches your e-bike battery, then you can further check the parameter labels of both to confirm that the charging voltages are compatible. In case of compatibility you can try to charge the battery.
2. Power supply and voltage converter: You can also use a power supply and a voltage converter to charge your e-bike battery. This method requires matching the voltage and polarity of the power supply to the requirements of the battery and using a voltage converter to step up or down as required. However, this option can be somewhat complex to operate and requires a certain level of expertise.
3. Find a charging station or service centre: In an emergency, you can find a local e-bike charging station or service centre.

Please remember that the above methods are for emergency use. For safety reasons, KET always recommends that you use a dedicated charger to charge your e-bike battery

How many hours does an electric bike battery last?: To calculate the estimated duration an electric bike battery lasts, we'll use an example with a lithium-ion battery (very common ebike battery types) and consider the recommended depth of discharge (DOD) of 80%. We'll also consider the conversion between different units such as watt-hours (Wh), ampere-hours (Ah), and voltage (V).

Battery Capacity: The battery capacity is usually specified in ampere-hours (Ah) and can be converted to watt-hours (Wh) using the battery voltage.
Example: Let's assume the electric bike has a 10Ah battery with a voltage of 36V.

Battery capacity (Wh) = Battery capacity (Ah) * Voltage (V)
Battery capacity (Wh) = 10 Ah * 36 V = 360 Wh

To calculate the usable capacity of the battery considering the DoD:

Usable capacity (Wh) = Battery capacity (Wh) * DoD
Usable capacity (Wh) = 360 Wh * 0.8 = 288 Wh
Power Consumption: The power consumption of the electric bike can vary depending on factors like motor power, assist level, and terrain. Different bikes have different power consumption rates. As an example, let's assume the electric bike consumes an average of 250 watts.

Calculating Battery Life: We can use the battery capacity and power consumption to estimate the battery life.

Using time (in hours) = Usable capacity (Wh) / Power consumption (W)

Using the example values:

Using time = 288 Wh / 250 W = 1.15 hours

Therefore, the estimated battery using time for this example would be approximately 1.15 hours.

Please note that this is a rough estimate, and actual battery using time may vary depending on various factors such as terrain and riding style.

How to reset e-bike battery?: For most brands of bicycles, resetting the battery is relatively simple and can be done by following these general steps:

1. Turn off the ebike

2. Unplug the connector of ebike battery or remove the battery from the holder.

3. Once the battery has been disconnected, leave it in this state for a few minutes. This allows any remaining charge in the system to dissipate and helps to reset the battery's internal circuitry.

4. After a few minutes, reconnect the battery to the e-bike.

5. Turn on the e-bike and check that the battery is working properly.

Picturer from Ebike Battery Supplier

Factory
Certification
Production & Test Equipment

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UL
CB
MSDS
UN38.3
CE
IEC-62133
Certification for Safe Transport of Goods
air transport
ISO 9001 2015
invention of Lithium battery testing equipment

Battery charge and discharge test system
Rechargeable battery performance testing equipment
Vibration Testing Machine
Salt spray test cabinet
Lithium battery automatic testing equipment
Discretionary cabinets
Integrated Tester
Battery Detector
Automatic Wire Stripping Machine
Automatic spot welding machine

How to Guarantee The Quality of Your Custom Ebike Battery Pack

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Quality Standards
As a professional electric bike battery company in China, KET has established and adopted an ISO 9001 management system that sets clear quality standards and specifications for each stage of the custom ebike battery assembly process.

Supplier Evaluation
KET only works with international or Chinese brands such as CATL, BYD, EVE, Samsung, LG, Sony, etc. And we only use brand new A-grade cells to ensure the high quality of all custom ebike batteries.

china e bike conversion kit with battery

Advanced Testing Equipment
In the battery industry, the sophistication and completeness of the equipment is a decisive factor in determining the strength of a factory. In order to ensure the high quality of all custom ebike battery packs, KET has invested heavily in equipment such as short-circuit and explosion-proof testers, vibration testers, shock testers, ageing testers, etc.

Complete QC process
Including incoming material testing, semi-finished product functional testing, appearance testing, aging testing, etc.

Traceability and Documentation
Maintain thorough documentation and traceability records for each battery produced. This allows for easy identification of any quality-related issues, facilitates product recalls if necessary, and enables effective root cause analysis.

Training and Certification
Provide comprehensive training to assembly line workers and technicians to ensure they understand the quality standards and assembly processes. Encourage them to obtain relevant certifications to demonstrate their competence.

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