48V 21Ah 18650 Rechargeable Lithium Ion Battery

Launched by Vcell Power, a genuine manufacturer based in China, the 48V 21Ah 18650 Rechargeable Lithium Ion Battery adopts the mature 13S7P cylindrical cell assembly technology. Drawing on more than 20 years of experience in lithium battery R&D and production, it delivers stable, safe and long-lasting 48V power supply solutions for small and medium-sized electric equipment. This battery pack combines large capacity and lightweight design, and the built-in intelligent BMS fully safeguards power usage safety.

Product Parameter

Core Technical Advantages

Vcell Power summarizes the technical strengths of this battery into six core features to meet B-end customers' comprehensive requirements for performance, safety and cost performance:

1. Large Capacity & Long Runtime -- The 48V 21Ah 18650 Rechargeable Lithium Ion Battery delivers 21Ah large capacity output, suitable for continuous operation of medium and high-power equipment and helps reduce charging frequency of devices.

2. Over 700 Cycles Lifespan -- Under standard operating conditions, the cycle life exceeds 700 times (100% DOD, 1C charge & discharge). Its service life can reach more than 5 years, which is far better than lead-acid batteries and lowers the long-term use cost.

3. Lightweight Replacement for Lead-Acid Batteries -- It weighs only about 4.4Kg, much lighter than lead-acid batteries of the same capacity. It facilitates equipment integration and installation, and improves the portability and runtime performance of the whole device.

4. Five-fold Safety Protection -- The built-in intelligent BMS management system offers protection against overcharge, overdischarge, overcurrent, short circuit and over temperature, comprehensively ensuring operational safety and cell health.

5. Expandable BMS Communication -- It supports expansion of multiple communication protocols including SMBUS/CANBUS/RS232/RS485/I2C and Bluetooth. It can exchange real-time operating data such as voltage, current, temperature, power level and health status with the main control unit of equipment to meet intelligent integration demands.

6. Eco-friendly & Compliant -- Free of heavy metals like lead, mercury and cadmium, it complies with international environmental standards and helps end products enter European, American and other markets with strict environmental regulations.

Diverse Application Scenarios

Benefiting from the nominal voltage of 48V and large capacity of 21Ah, the 48V 21Ah 18650 Rechargeable Lithium Ion Battery is widely applied in the following fields:

Electric Mobility Equipment -- Electric bicycles, electric motorcycles, electric scooters and electric tricycles. One full charge supports medium and long-distance commuting.

Garden Tools -- Electric hedge trimmers, grass trimmers and more, providing continuous and stable power output.

Mobility Aids for the Elderly -- Electric mobility scooters and electric wheelchairs, ensuring reliable power supply for daily travel.

Scenic Area Sightseeing Vehicles -- Used for sightseeing cars in scenic spots. Long runtime reduces charging frequency and improves operational efficiency.

Industrial Intelligent Equipment -- Warehouse AGVs, automatic guided vehicles and small inspection robots, adapting to frequent charge and discharge working conditions.

Outdoor Energy Storage -- Outdoor camping power stations and emergency backup power supplies to meet off-grid power demands.

Customization Support

As a manufacturer with over 20 years of experience in the lithium battery industry, Vcell Power boasts full-chain independent capabilities ranging from cell formula development to battery pack packaging. We offer flexible customization options for the 48V 21Ah 18650 Rechargeable Lithium Ion Battery:

Overall Dimension -- Customize the length, width and height of the housing according to equipment structure to fit narrow spaces.

Connector Type -- Compatible with common terminal specifications such as XT60 and Anderson, and customized connectors are available per customer drawings.

BMS Parameters -- Adjust thresholds of overcharge, overdischarge, charge & discharge current limit and temperature protection.

Communication Protocol -- Optional communication solutions including SMBUS/CANBUS/RS232/RS485/I2C and Bluetooth.

Appearance Marking -- Customize housing color, brand LOGO and label content.

Sample delivery time is arranged according to order schedule. The lead time for bulk orders is about 25-30 days to support the rapid progress of customers' projects.

Notes on Use

To ensure the safe use and long service life of the 48V 21Ah 18650 Rechargeable Lithium Ion Battery, please follow the operating specifications below:

1. Use Dedicated Charger -- Must use a dedicated 48V lithium battery charger (charge cut-off voltage: 54.6V). Do not use incompatible or non-standard chargers, otherwise it may cause overcharging, battery damage or potential safety hazards.

2. Charging Environment Requirements -- Keep well ventilated during charging. Stay away from fire sources, heat sources and humid environments, and avoid direct sunlight. The recommended charging ambient temperature is 0℃~45℃.

3. Avoid Physical Damage -- Never subject the battery pack to strong impact, extrusion, piercing or dropping, so as to prevent shell rupture or internal short circuit.

4. Handling Abnormal Conditions -- Immediately stop using the battery if bulging, liquid leakage, peculiar smell, abnormal heat or shell damage is found, and contact professional personnel for handling.

5. Operating Temperature Range -- The discharging temperature ranges from -20℃ to +60℃, and the charging temperature ranges from 0℃ to 45℃. Using the battery beyond this range may affect its performance and service life.

6. Long-term Storage Method -- If the battery will not be used for more than 1 month, charge it to 50%~60% state of charge. Store it in a dry, cool (10℃~25℃) and dark place, and recharge it every 3 months to maintain cell activity.

7. No Disassembly or Modification -- Non-professionals are strictly prohibited from disassembling, modifying or repairing the battery pack. The built-in BMS parameters are preset before delivery, and unauthorized changes may lead to failure of protection functions.

8. Proper Disposal of Waste Products -- Hand over waste batteries to professional recycling institutions. Do not throw them into fire or discard them as ordinary domestic garbage to protect the environment.

All 48V 21Ah 18650 Rechargeable Lithium Ion Battery are delivered after cell sorting and matching, aging test and consistency inspection to guarantee stable performance of each batch. The products have passed international certifications including UN38.3, UL, CE and ROHS. The package adopts independent foam insulation, sealed carton and pallet stacking. We support international logistics methods such as FedEx and UPS to ensure safe delivery for customers.

Why Choose Vcell Power

Among numerous lithium battery suppliers, Vcell Power stands out with differentiated advantages and has become a long-term partner for global B2B customers:

1. Technology Accumulation Since 2001 -- We started with Ni-MH batteries, stepped into the lithium battery industry in 2003, launched the first 18650 cylindrical cell in 2004, and realized mass production of lithium iron phosphate batteries in 2007. In recent years, we have gradually expanded the sodium-ion battery product line. With over two decades of continuous technology iteration, we master the complete manufacturing process from raw cells to finished battery packs.

2. Full Coverage of International Certifications -- The entire product line has obtained certifications including IEC, UN38.3, UL, CE, ROHS, KC and CB. We also provide MSDS as well as sea and air transportation appraisal documents, enabling smooth export to more than 80 countries worldwide without compliance issues.

3. Proven Reliability from Practical Cases -- We have served multiple project clients across Europe, North America and Southeast Asia, and possess rich experience in large-scale mass delivery.

4. Reverse Customization Capability -- In addition to customization on regular dimensions, interfaces and communication protocols, we can also optimize cell selection and BMS parameters according to equipment operating curves such as continuous discharge platform and peak impact duration to achieve in-depth adaptation.

5. Transparent Service Process -- We provide a full closed-loop service covering demand communication, technical solution formulation, sample testing, small-batch verification, mass delivery and after-sales follow-up. Our engineer team can quickly respond to technical demands.

6. Flexible Business Policies -- We support various cooperation modes including tiered quotation, annual framework agreement and credit account period, helping customers reduce procurement risks and cash flow pressure.

Frequently Asked Questions

Q: Can this product directly replace my existing 48V lead-acid battery?

A: Yes.The 48V 21Ah 18650 Rechargeable Lithium Ion Battery is electrical parameters match most 48V lead-acid batteries. It is much lighter, please check the installation size before use.

Q: Under what test conditions is the cycle life of over 700 times measured?

A: Tested at room temperature with 100% DOD and 1C charge/discharge. Its service life is far longer than regular lead-acid batteries.

Q: How to configure the BMS communication function? Is there any extra charge?

A: Communication functions are optional and charged separately. Please contact our sales team for details.

Q: Can this battery be used in low-temperature environments? What are the requirements for charging?

A: It works from -20℃ to +60℃ for discharge. Charge it between 0℃ and 45℃, and preheat it in cold conditions.

Q: How to store the battery when it is not used for a long time? What about its self-discharge performance?

A: Keep 40%-60% charge, store in dry and cool place and recharge every 3 months. It has low self-discharge.