43.2V 40Ah 21700 Electric Surfboard Battery Packs

CMB proudly designs and manufactures battery packs specially crafted and equipped for electric surfboards and eFoils. Learn more about our electric surfboard battery offerings below, and reach out to a CMB team member today to get started with your custom battery pack design.

43.2V 40Ah 21700 Electric Surfboard Battery Pack Design

Product Highlights

Upgraded Technology: The 43.2V 40Ah 21700 battery pack for electric surfboards is the newest upgrade to the 43.2V 35Ah 18650 eFoil battery pack. Manufactured by CMB, it uses cutting edge Smart BMS and abstract heat technology to ensure battery reliability.
Enhanced Capacity: The 21700 battery cells used in this pack offer a substantial increase in capacity, now providing an impressive 40Ah. This increased capacity translates to longer surf sessions, allowing enthusiasts to enjoy extended time on the water without worrying about power limitations.
Optimized Design: CMB’s custom design expertise shines through in the 43.2V 40Ah 21700 battery pack. With a focus on waterproof solutions, our engineering team has created a battery pack tailored specifically for the demanding conditions of water sports. This ensures reliability and peace of mind even in challenging environments.

Specifications
Development Timeline

43.2V 40Ah 21700 Lithium Ion Battery for Electric Surfboard Parameter Specifications

No.	Item	Specification	Note
1	Nominal Voltage	43.2V	3.6V/Cell
2	Nominal Capacity	40Ah	@0.2C
3	Minimum Capacity	39Ah	/
4	Initial Internal Impedance	≤250mΩ	AC 1KHZ
5	Standard Charge Voltage	50.4V	4.2V/Cell
6	Standard Charge Current	8A	@0.2C
7	Max. Charge Current	15A	BMS Limit
8	Standard Discharge Current	8A	@0.2C
9	Max. Discharge Current	80A	/
10	Discharge Cut-off Voltage	32.4V	2.7V/Cell
11	Cycle Life	≥500 cycles	Retention: ≥80%
12	Charge Temperature	0°C~45°C	Standard Charge
13	Discharge Temperature	-20°C ~70°C	Standard Discharge
14	Storage Temperature	-20°C~ 45°C	≤3 Months
14	Storage Temperature	0°C ~ 25°C	≤1 Year
15	Weight	About 12.4Kg	/
16	Special Request	Waterproof IP68	/

The Development Timeline Schedule of Custom Battery Pack for eFoil

You can get in contact with our consultant to get the specific timeline for your custom battery pack solution.

Preliminary Design
After receiving your initial questionnaire, we’ll create a custom design for your battery. Timeframe: 2 days.
3D Drawing
Next, we’ll provide you with a detailed CAD drawing of your custom battery. Timeframe: 2 days.
Approval of Specifications
We’ll share your battery pack specifications for your approval. Timeframe: 2 days.
Estimate
Next, we’ll create a pricing estimate for you to sign off on. Timeframe: 1 day.
Housing
If your battery pack requires custom housing, we’ll require some additional time to accommodate this request. Timeframe: 8-9 weeks.
BMS Development
We’ll craft a custom battery management system (BMS) for your unique battery to ensure safe and effective performance. Timeframe: 7-10 days for standard BMS, 25-30 days for Smart BMS.
Sample Creation
Next up, we’ll create a sample battery pack for you to sign off on before production. Timeframe: 5 days.
Sample Shipment
Once your sample is ready, we’ll ship it straight to you for approval. Timeframe: 4-7 days.
Certification
We can also assist with obtaining UL certification for your custom battery pack. Timeframe: 2-3 weeks.

Specifications

43.2V 40Ah 21700 Lithium Ion Battery for Electric Surfboard Parameter Specifications

No.	Item	Specification	Note
1	Nominal Voltage	43.2V	3.6V/Cell
2	Nominal Capacity	40Ah	@0.2C
3	Minimum Capacity	39Ah	/
4	Initial Internal Impedance	≤250mΩ	AC 1KHZ
5	Standard Charge Voltage	50.4V	4.2V/Cell
6	Standard Charge Current	8A	@0.2C
7	Max. Charge Current	15A	BMS Limit
8	Standard Discharge Current	8A	@0.2C
9	Max. Discharge Current	80A	/
10	Discharge Cut-off Voltage	32.4V	2.7V/Cell
11	Cycle Life	≥500 cycles	Retention: ≥80%
12	Charge Temperature	0°C~45°C	Standard Charge
13	Discharge Temperature	-20°C ~70°C	Standard Discharge
14	Storage Temperature	-20°C~ 45°C	≤3 Months
14	Storage Temperature	0°C ~ 25°C	≤1 Year
15	Weight	About 12.4Kg	/
16	Special Request	Waterproof IP68	/

Development Timeline

The Development Timeline Schedule of Custom Battery Pack for eFoil

You can get in contact with our consultant to get the specific timeline for your custom battery pack solution.

Preliminary Design
After receiving your initial questionnaire, we’ll create a custom design for your battery. Timeframe: 2 days.
3D Drawing
Next, we’ll provide you with a detailed CAD drawing of your custom battery. Timeframe: 2 days.
Approval of Specifications
We’ll share your battery pack specifications for your approval. Timeframe: 2 days.
Estimate
Next, we’ll create a pricing estimate for you to sign off on. Timeframe: 1 day.
Housing
If your battery pack requires custom housing, we’ll require some additional time to accommodate this request. Timeframe: 8-9 weeks.
BMS Development
We’ll craft a custom battery management system (BMS) for your unique battery to ensure safe and effective performance. Timeframe: 7-10 days for standard BMS, 25-30 days for Smart BMS.
Sample Creation
Next up, we’ll create a sample battery pack for you to sign off on before production. Timeframe: 5 days.
Sample Shipment
Once your sample is ready, we’ll ship it straight to you for approval. Timeframe: 4-7 days.
Certification
We can also assist with obtaining UL certification for your custom battery pack. Timeframe: 2-3 weeks.

Learn More about Our Customization Process

How We’ll Work Together

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We’ll ask questions via our inquiry form about your specific battery needs. Please provide us with the voltage, capacity, specific battery casing, and any special requirements at this time.